<h2><SPAN name="LESSON_III" id="LESSON_III"></SPAN><span class="lght">LESSON III</span><br/> PHYSIOLOGY OF THE FEMALE SEX ORGANISM</h2>
<p>In the preceding lesson you have been shown "just
what" each one of the sex organs of the woman <b>is</b>. In the
present lesson you will be shown "just what" each of
these organs <b>does</b>—what its functions and offices are.
The preceding lesson dealt with the <b>anatomy</b> of these
organs; the present lesson will deal with the <b>physiology</b>
thereof.</p>
<p>Beginning with the Ovaries, the fundamental and
basic sex organs of the woman, you will have explained
to you the wonderful processes performed by each of
these organs in turn.</p>
<p><b>The Ovaries.</b> The Ovaries in the woman are akin to
the testicles in the man. Without the Ovaries there would
be no ova or eggs, and without the ova there would be
possible no reproductive purposes, and therefore no office
for the sex organs at all, for reproduction is the fundamental
office, function, and purpose of the entire sexual
organism.</p>
<p>In our consideration of the office, purposes, and functions
of the Ovaries, however, we must not overlook a
certain secondary phase of such functioning. While it
is true that the primary purpose of both the testicles of
the male, and the Ovaries of the female, is that of providing
<b>seed</b> from which the offspring of the individual
may be produced, it is likewise true that there exists a
secondary purpose which may be called the "individual"
purpose as contrasted with the "racial" and primary
one.</p>
<p>This secondary or "individual" purpose of the Ovaries
is that of manufacturing certain secretions which are<span class="pagenum"><SPAN name="Page_22" id="Page_22">{22}</SPAN></span>
absorbed by the blood of the woman, and which play an
important part in her physical and mental well-being and
activities. These secretions begin before puberty in the
woman, and continue after her menopause; whereas the
manufacture of the ova begins only at puberty, and ceases
with the menopause, keeping pace with the manifestation
of menstruation in its beginning and its ending.</p>
<p>Nature provides these chemical secretions from the
Ovaries for the purpose of giving the woman her characteristic
physical form and contour, her form, her breasts,
her long hair, her broad pelvis, her soft voice, and other
secondary sex characteristics; and also of providing for
the normal development of the other sex organs. As a
proof of this statement, science shows us that if a woman's
ovaries are completely removed there is usually a consequent
atrophy or "drying up" of the Uterus and the
Vagina, and often even of the Vulva. Moreover, the
presence of this internal secretion manifests in arousing
and maintaining in the woman her normal sexual desire,
and her normal pleasure in the company of her mate; it
being noted that if the ovaries are removed, particularly
in early life, the woman is apt to lose all sexual desire
and normal womanly feeling toward the other sex. And,
finally, these secretions make for general physical and
mental health and well-being in the woman, and contribute
to her vivacity, energy, and activity in all directions.
As writers on the subject have well pointed out,
this is the reason that capable surgeons usually try to
leave at least a portion of the Ovaries when performing
an operation for the removal of those organs on account
of diseased condition.</p>
<p><b>The Ovum.</b> The Ovum, or human egg, is a small
spherical body, measuring from one two-hundred-and-fortieth
to one one-hundred-and-twentieth of an inch in
diameter. It has a colorless transparent envelope, the<span class="pagenum"><SPAN name="Page_23" id="Page_23">{23}</SPAN></span>
latter enclosing the yolk which consists of granules or
globules of various sizes embedded in a viscid fluid. In
the center of the yolk is found a very small vesicular body
consisting of a tenuous transparent membrane, which is
known as "the germinal vesicle;" this, in turn, contains
a very tiny granular structure, opaque, of yellow color,
known as "the germinal spot."</p>
<p>When the time is reached in which the ovum or egg
is to be discharged, the Graafian follicle becomes enlarged
by reason of the accumulation of the fluids in its interior,
and exerts such a steady and increasing pressure from
within, outward, that the surrounding tissue yields to it,
and it finally protrudes from the Ovary, from whence it is
then expelled with a gush, owing to the elasticity and
reaction of the neighboring tissues.</p>
<p>Following this rupture there occurs an abundant
hemorrhage from the vesicles of the follicle, the cavity
being filled with blood, which then coagulates and is
retained in the Graafian follicle. The formation and development
of the Graafian follicle begins at puberty and
continues until the menopause or "change of life" of the
woman. Many follicles are produced, but many do not
produce ova, and so gradually atrophy. The ripening and
discharge of the eggs produce a peculiar condition of
congestion of the entire female sexual organism, including
the Fallopian Tubes, the Uterus, the Vagina, and even
of the Vulva, which results in a condition of Sexual Excitement.
Among the lower animals the female will allow
the male to approach her for copulation only at this
period, this being the time when the egg is ready for
fertilization.</p>
<p>When the female infant is born, her Ovaries contain
the germs of about 100,000 ova. The greater portion of
these, however, disappear, until at the time of her puberty
the number of germs of ova contains only about 30,000<span class="pagenum"><SPAN name="Page_24" id="Page_24">{24}</SPAN></span>
ova. This number is far more than the woman will ever
need, and is Nature's provision against diseased portions
of the Ovaries, accidents, etc. Only one ovum ripens and
matures each month from puberty until menopause, so
that the woman really requires only about 300 to 350 ova
on the average. This liberality on the part of Nature,
however, does not begin to approach her lavishness in the
case of seed of the male, for in his case while only one
spermatozoon is required to fertilize an ovum (and in
fact only one is permitted to do so), we find that in each
normal act of ejaculation of semen by the male over
250,000 spermatozoa are projected.</p>
<p>The ripening and discharge of the egg from the
Ovaries, and the consequent congestion above referred to,
accompanied by what is called Menstruation, occurs regularly
each lunar month (28 days). What is called Ovulation
consists of the monthly maturing and expulsion of
the ripe ovum or egg, while Menstruation (as we shall
see later on) consists of the monthly discharge of blood
and mucus from the inner surface of the Uterus; the two
processes occur in connection with each other, yet neither
can be considered as the cause of the other.</p>
<p><b>Menstruation.</b> It may be well to call your attention at
this point to the process known as Menstruation, or "the
monthly flow," or "the courses" of women. Menstruation
is the monthly flow of bloody fluid which occurs in all
healthy (non-pregnant) women from puberty to the
menopause or "change of life."</p>
<p>By "<b>Puberty</b>" is meant the age at which a woman
begins her period of possible child-bearing experience. In
temperate climates the average age of puberty is about
fourteen years, while in tropical countries it is often a
year or so earlier, and in arctic countries a year or so
later. The time, however, depends materially upon the
temperament, race, hygiene, and general environment of<span class="pagenum"><SPAN name="Page_25" id="Page_25">{25}</SPAN></span>
the individual girl. At this period the girl gradually
changes into the young woman. Her figure changes, her
bust develops, her hips broaden, and her mental and emotional
nature undergoes a change. Also the menstrual
flow begins to manifest at this time; at first scanty and
irregular, but gradually changing into the characteristic
flow each month.</p>
<p>At the period of puberty, the girl undergoes marked
emotional changes. She becomes very "emotional" as a
rule, and quite "sensitive." She becomes filled with
strange, unaccountable longings, ideas, and "notions."
She usually manifests a great emotional interest in her girl
friends, and often manifests marked jealousy in connection
with these friendships. The girl is apt to indulge in
day-dreaming at this period, and becomes quite romantic
and "flighty." She devours love stories, and delights in
imagining herself as the heroine of similar adventures.
The period from the beginning of puberty to that of the
attainment of full sexual maturity is known as the period
of "adolescence," and generally extends to about the age
of eighteen in the case of girls.</p>
<p>By the <b>Menopause</b> is meant that period of the woman's
"change of life," the average time of which is about the
age of forty-five years, although this varies greatly in
different individuals. As a rule, it is held that the period
of the woman's child-bearing possibility extends over an
average period of thirty years. At the Menopause the
woman's reproductive activity declines and finally ends.
The Ovaries diminish in size, the Graafian follicles cease
to form and develop; the Fallopian Tubes atrophy; and
there occur other physical, mental, and emotional changes
in the woman. While the age of forty-five is held to be
the average age at which the Menopause occurs in women,
still it is not at all uncommon to find women who menstruate
regularly up to the age of fifty, or fifty-two, or<span class="pagenum"><SPAN name="Page_26" id="Page_26">{26}</SPAN></span>
even fifty-five, while a large number of women menstruate
regularly at the age of forty-eight.</p>
<p>Some women undergo little or no physical or emotional
disturbance at the time of the Menopause. In such
cases their periods become more or less irregular, with
extending intervals between periods; the flow becomes
more and more scanty; then several periods are skipped
altogether; and finally the periods cease entirely. Other
women, however, experience more or less physical disturbance
during the years of the "change." They sometimes
experience loss of appetite, or a capricious appetite,
headaches, loss of weight, or else a sudden taking on of
fatty tissue. They often become quite irritable and
"notiony," and often become quarrelsome and pugnacious,
and in some cases manifest unreasonable jealousy.
But, in the opinion of many of the best authorities, much
of this trouble comes from the mental expectancy of them
by the woman, resulting from the notion that a woman
must have these things happen to her. The power of the
mind over the body is now well known, and we have here
another instance of its effect. The remedy is obvious.</p>
<p>Another matter which disturbs the woman at this
time, in many cases, is the common belief that after "the
change" she will lose all of her sex attractiveness, and
her sexual feelings, etc. This is a grave error, for the
experience of all observing physicians is that no such
results follow this period of the woman's life. Many
women become even more attractive to the other sex
after this time, by reason of acquiring a certain maturity
and "ripeness" which proves very attractive to many
men—often to young men as well as older ones. Moreover,
the sexual desires do not cease with the cessation of the
reproductive functions. On the contrary, it often happens
that such emotions and desires are increased in the woman
at, and after, this time of her life. So true is this that this<span class="pagenum"><SPAN name="Page_27" id="Page_27">{27}</SPAN></span>
period has been called "The Dangerous Age" for women,
and the experience of many a woman of forty-five to fifty
will corroborate this statement. The woman at this time
should beware of contracting unwise love affairs and
entanglements, and of yielding to impulses toward men
other than her mate. A word to the wise should be sufficient
in this case.</p>
<p>To return to the main subject of Menstruation, it may
be said that the monthly flow, when once established,
occurs at intervals of every twenty-eight days, on the
average, although in some individual cases it occurs as
often as every twenty-one days, while in others it occurs
as seldom as once in every six weeks, all without exceeding
the bounds of normal functioning. Menstruation ceases
temporarily during pregnancy, in normal cases, and often
also ceases during the period of lactation or nursing.
The menstrual period lasts on an average for four or five
days, the flow increasing for the first half of the period,
and decreasing during the last half. At the beginning of
the period there is often manifested a general congestion
of all of the sexual organs of the woman, and often of the
breasts as well. There is also usually found a sense of
physical discomfort, from which more or less irritable
feeling arises. In rare cases there are found severe cramps
and pains, and in some cases the woman finds it necessary
to call in medical aid, or to go to bed, or both. In such
cases a cure is often worked by improving the general
health, and by observing common sense hygienic rules.</p>
<p>Menstruation is caused by a hypertrophy of the mucus
membrane of inner surface of the Uterus, which is followed
by a shedding of the hypertrophied membrane.
This leaves exposed the underlying vessels, which bleed.
New mucus membrane is formed after the period. The
menstrual flow consists of a thin, bloody fluid, having
peculiar odor, in which is combined blood, thin skin, and<span class="pagenum"><SPAN name="Page_28" id="Page_28">{28}</SPAN></span>
mucus membrane, and also mucus from the Uterus and
the Vagina, the blood being light in consistency and not
clotted.</p>
<p>During the menstrual period the ovum, or egg, is discharged,
and enters the Uterus, as we shall see presently.</p>
<p><b>The Life-History of the Ovum.</b> The physiology of the
remaining sexual organs of the woman may perhaps best
be studied by considering the story of the Life-History of
the Ovum, or human egg, for the functions of such organs
are concerned with such life-history of the egg, and really
exist merely to create such a history, or rather, to produce
the process which constitutes the basis of such history.</p>
<p>The ovum, or egg, when discharged from the ovary, is
at first surrounded by a few cells which serve as nourishment,
but which soon disappear. It enters the Fallopian
Tube and begins its journey toward the Uterus, being
urged on its way by the constant movement of the lining-cells
of the interior of the tube, in the direction of the
Uterus. Certain changes in structure occur. Its passage
to the Uterus may be interrupted, and the ovum lost and
finally cast off. But the ovum that is successful finally
arrives at the Uterus where it awaits impregnation or
fertilization by the spermatozoon of the male.</p>
<p>If copulation occurs within a reasonable time after
the arrival of the ovum, it is impregnated or fertilized.
Fecundation results and conception ensues, the ovum then
remaining attached to the walls of the Uterus, and in time
develops into the foetus. If, however, the ovum is not
impregnated, because of absence of copulation or from
other causes, it gradually loses its vitality, and is finally
cast off with the several uterine secretions.</p>
<p>It should be explained here that the "spermatozoon"
of the male (the plural of the term is "spermatozoa") is
the male generative "seed." The sperum, semen, or
seminal fluid of the male is filled with hundreds of thousands
<span class="pagenum"><SPAN name="Page_29" id="Page_29">{29}</SPAN></span>of spermatozoa. Each spermatozoon is a minute
living, moving creature, resembling a microscopic tadpole.
It has a head, a rod-like body, and a thin hair-like tail, the
latter being kept in constant motion from side to side, by
means of which the tiny creature is enabled to travel
rapidly from one point to another. The human
spermatozoon measures about one six-hundredth of an inch
in length. It is composed of protoplasm, the substance of
which all living creatures are composed. The spermatozoa
are believed to be developed from a parent sperm-cell, by
the process of segmentation or subdivision, which process
is common to all cell-life. The numerous spermatozoa
dwell in a gelatinous substance, which, mingling with the
other fluidic secretions of the glands of the male, constitutes
the male seminal fluid, sperm, or semen, which is
ejaculated by the male during the process of copulation.</p>
<p>Fecundation (i. e. fertilization, impregnation; the
process by which the male reproductive element is
brought in contact with the female ovum or egg) is
brought about by the blending of the male reproductive
element (or spermatozoon) with the female reproductive
element (or ovum, or egg). This blending is of course
accomplished by the bringing together in mutual contact
the two reproductive elements just mentioned. The sexual
act which results in this "bringing together" of the two
elements is known as "copulation," or "coition." In
copulation or coition the seminal fluid of the male, containing
an enormous number of spermatozoa, is ejaculated
from the male intromittent organ into the receptive canal
or channel of the female (the Vagina), and in this way
finally comes into actual contact with the female ovum or
egg which is awaiting it in the Uterus of the female.</p>
<p>The spermatozoa (in the process of copulation) are
deposited in the Vagina of the female, usually at its upper
end, but sometimes in the lower portion; and in rare and<span class="pagenum"><SPAN name="Page_30" id="Page_30">{30}</SPAN></span>
peculiar cases even at or about the Vaginal Orifice or
outer vaginal opening. In either case they travel up the
remaining portion of the Vagina and finally enter the
Uterus or womb. The spermatozoa possess wonderful
vitality and power of locomotion. There are cases recorded
in which the spermatozoa deposited on or about the outer
female genitals have managed to travel inward and upward
until they have finally reached the Uterus, where
conception has resulted. Such cases, of course, are rare,
but they exist, well authenticated and accepted by medical
science as facts.</p>
<p>It must not be supposed, however, that the impregnation
of the ovum occurs only in the womb proper. Cases
are known in which the spermatozoa have traveled along
the Fallopian Tubes and impregnated the ovum there; and
in very rare cases the spermatozoon seems to have penetrated
even to the Ovary itself, and there impregnated
the ovum on the surface of the Ovary. Some excellent
authorities, in fact, insist that all normal impregnation
occurs at the end of the Fallopian Tube—the point of its
entrance into the upper part of the womb, rather than in
the body of the womb, or at its mouth, as the older
authorities taught. But wherever the actual contact of
spermatozoon and ovum occurs, the blending of the elements
is performed and fertilization, impregnation, or
fecundation is accomplished.</p>
<p>As a result of copulation, then, the spermatozoon (or
a number of spermatozoa) comes in contact with the
female ovum or egg. Then one or more of them, by means
of a furious lashing of the tiny tail, manages to penetrate
the outer covering of the ovum, and enters the space
between the outer covering and the real body of the egg.
Several spermatozoa may effect an entrance into this
outer space, <b>but only one is permitted to enter the real
body of the egg</b>. [Twins are produced by the impregnation
<span class="pagenum"><SPAN name="Page_31" id="Page_31">{31}</SPAN></span>of two ova by two spermatozoa, at the same time. The
presence of the two ova at the same time is unusual]. The
moment that the real body of the ovum is penetrated by
the successful spermatozoon, a tough covering or thick
membrane forms around the ovum and thus prevents the
entrance of other spermatozoa. The successful spermatozoon
then loses its tail, and the remaining head and
body become what is known as "the male pronucleus."</p>
<p>The authorities are uncertain as to the exact nature
of the change which occurs when the ovum is penetrated
by the spermatozoon. The outward manifestations of the
change and transformation arising from the blending of
the male and female elements are of course well known,
but the "life process" eludes the power of the microscope.
When Nature forms the thick membranous coating over
the impregnated ovum, she draws the veil over one of
her most important secrets. The first segmentation-nucleus
having been formed by the blending and forging
together of the male and female pronuclei, the process of
segmentation begins.</p>
<p>Segmentation proceeds as follows: the impregnated
egg splits into halves, forming two joined cells; then into
quarters, forming four joined cells; then into sixteenths,
then into thirty-seconds, sixty-fourths, and so on, until
the ovum consists of a combined mass of very minute
granular-like cells, the whole resembling a mulberry.
The segmentation of the nucleus precedes and then continues
with the segmentation of the yolk. After the egg
has been divided into a great number of these cells, the
latter begin a centrifugal action resulting in the formation
of a complete inner lining of closely packed cells,
with a central cavity filled with the yolk liquid.</p>
<p>In the meantime, the Uterus has been prepared for the
reception of the impregnated and transformed ovum. A
thick, spongy, juicy, mucus membrane forms, into which<span class="pagenum"><SPAN name="Page_32" id="Page_32">{32}</SPAN></span>
the changing ovum passes and attaches itself; the mucus
membrane soon enveloping it and shutting it off from the
rest of the Uterus. There now appears at one point on
the ovum an opaque streak, which is called "the primitive
trace" of the embryo—the first beginning of the young
living creature. The "primitive trace" then grows in
length and breadth. At this point we must leave the history
of the ovum, or human egg, for the present; its
further development will be related in the succeeding
lesson, the subject of which is "Gestation."</p>
<p><span class="pagenum"><SPAN name="Page_33" id="Page_33">{33}</SPAN></span></p>
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