Female ReproductiveSystem Ever thought to yourself, how come the femalereproductive system is so unique? The female reproductive system is uniquebecause it can reproduce, it can produce milk for a new born, and it can alsocarry a small human being for nine months! We will soon discuss the femalesbreast, lower tors, fertilization and pregnancy, and birth and infancy. Females Breast A females breast play a big role for new born babies.When a baby is first born they depend on milk from the mothers breast.
Internally,each breast on female is formed mammary glands, a gland in mammals thatprovides the milk to feed the young ones. As mentioned before, the femalesbreast form milk to feed infants. The milk is formed and put away by themammary glands and freed out the mammary vessel and nipple. Tips of sensitivenerves in the nipple send signs to the brain to produce hormone oxytocin, whichis also utilized to assist mothers gather contractions in labor and controlbleeding, and start the let out of milk.
Next, in the breast area is the areola a circular area of dark skin aroundeach nipple. The nipple itself can be found near the tip of each breast,surrounding the nipple.Lower TorsoNextis the lower torso, which is where the ovaries, ovarian ligament, uterus,cervix of uterus, vulva, labia majora, labia minora, fallopian tube, and vaginacan be found. We’re going to start in the ovaries, the ovaries participates intwo roles in a woman’s’ reproductive arrangement, by reacting as glands andgonads (organ that forms gametes). Presenting as glands, the ovaries form multiplefemale sex hormones requiring estrogens and progesterone (two hormones thatmaintain the health of a female). Estrogen supervises the formation of themammary glands and uterus during puberty and refreshes the process of the uterinelining in the process of a female’s period (menstrual cycle).
At birth ovariesmay have between several hundred thousand to several million circular bunchesof cells known as follicles, a little secretory sac. The uterus is almost thesame shape and size as a pear, but it sits in an upside down setting. Theuterus can be found on the midline rear of the urinary bladder and anterior ofthe rectum.
The figure of the uterus is an open and empty area where the eggembeds itself and grows during pregnancy. The fallopian tubes enlarge sidewaysfrom the corners of the fundus. The uterus builds a wide layer of vascular endometrialtissue in development to collect a pollinated egg throughout the period ofovulation.
If the egg doesn’t become pollinated by the time it reaches theuterus, it will move throughout the uterus and set off a females period, whichoccurs almost every 28 days for most females. If it is a fortunate pollinationthe egg turns into a baby, it arouses changes in the endometrium that guide tothe formation of the placenta. The vulva, also the common name for the outside female privateareas in the pubic region, including the labia, clitoris, and urethral and vaginalopenings. These organs perform together to help urination and sexualreproduction.
There are 2 labia’s one is the labia majora and the labia minora.The labia minora is known to be the two hairless creases of skin that appear inthe vulva. Labia majora is a much lengthy and narrow arrangement expanding fromthe pudendal cleft beyond the top of the labia majora. Within the labia minorais the clitoris, the outer urethral orifice, and vaginal orifice. The clitorisalso extends to the internal tissues of the vulva. The labia majora is a pair of round creases of skin and isa fragment of a females outer genitalia. The labia majora is there to guard theinner, more fragile and delicate systems of the vulva.
They can also be found inthe pubic area on the exterior of the body. Unlike the inner structure of thevulva, the labia majora contain many pubic hairs that also assist to secure therest of the vulva from mechanical stress and abrasion. The adipose tissue ofthe labia majora also helps shield the vulva from outside stress. The labia minora is a pair of cutaneous creases thatcreate a area of the vulva. They also perform as a protector of the clitoris,urinary orifice , and vaginal orifice. They can be found in the vulva minor tothe mons pubis and medial to the labia majora in the pudendal split.
Unlike thesurrounding, mons pubis and labia majora, the labia minora are sheltered withhairless skin and contain very little adipose tissue. The labia minora hasseveral distinct layers of tissue. The outside layer is made of non-keratinizedstratified squamous epithelium continuous with surrounding skin. Next is alayer of fibrous connective tissue never-ending with dermis of the skin.
Collagen and elastin protein fibers present in the connective tissues providestrength and elasticity to the labia minora, while vascular and nervous tissuessupport the cells of the outer epithelial covering. The fallopian tubesare also known as the uterine tubes, which are a pair of four inch (tencentimeters) long narrow tubes bringing the ovaries to the uterus. Egg cellsare taken to the uterus by the fallopian tubes behind ovulation. If sperm isactive following sexual intercourse, the ova may also be pollinatedwhile in the fallopian tubes. The outer most covering of the fallopian tubes, ismade of a serosa membrane of simple squamous epithelial tissue assisted by theareolar connective tissue.
They are far from submissive tubes in the femalereproductive system. In the process of fertilization theyplay a big active role . The female vagina is an elastic, muscular tubeconnecting the cervix of the uterus to the vulva and outside of the body. Posteriorto the urinary bladder and anterior to the rectum,also located in the pelvic body cavity . Measuring around three inches in lengthand less than an inch in width. But it can stretch to become several incheslonger and many inches wider during sexual intercourse and child birth. Thesurface on the inside of the vagina is creased to give better elasticity and toincrease friction through intercourse.
Secretions made by the vaginalepithelium ease the vagina and have an acidic pH to stop the development ofbacteria and yeast. Acidic pH also makes the vagina an unwelcoming setting forsperm, which has resulted in males making alkaline seminal fluid to neutralizethe acid and better the survival of the sperm. The tunica externa, theouter most layer of the vagina is a heavy irregular connective tissue thatmakes the outer protective cover of the vagina.
The elastic build of the vaginapermit it to extend in both length and width. Fertilization AndPregnancy Duringfertilization and pregnancy there is a fetus in the womb, which is also calledan embryo four weeks after it comes into existence. Around the time ofimplantation, some cells in the blastocyst, the early phase of embryonicdevelopment, organize themselves into a group that will give rise to the bodyof the offspring. For about a week, its heart has beenbeating . The head is defined, with eyes and rudiments of ears visible, andinside there is the brain beginning, so far there are no bones. Where the armsand legs will begin to grow, . bumps are starting to bulge.
From the thirdmonth on, all sorts of finishing touches will be put on. Fingernails willappear, eyelids will form, facial features will gradually shift, lips form,cheeks fill out, taste buds develop and sex organs begin to produce its first eggs. During the first trimester (eight weeks), the fetus goesthrough a huge development process.
The embryo develops from an egg fertilizedby sperm. It starts off as one cell, but then begins to break down into twocells by the time it falls to the fallopian tube to the uterus. The embryobecomes a pear shape. The head forms at the round end and the spine at thepointed end. These two halves grow in the direction of each other until theycombine to create the neural tube. The embryo is now recognized as a mammal inthe forth week,. Buds of tissue from what will soon turn into the lungs,pancreas, liver, and gallbladder, are found inside of the embryo getting readyto form. A wide fold in the head then becomes visible to later develop thebrain.
Ears appear, eyes form as stalks, and folds of tissue which will turninto the jaws and other structures of the neck will begin to appear. Cartilage,bone, and muscle of the rear appear in paired bulge. The ears become visible, pits appear to markthe nose, the upper and lower jaw start to form, and limb buds extend, in thefifth week.
Two folds of tissue meet and join in the front of the embryo tomake the front wall of the chest and abdomen. The fetus begins to take the shape of a baby duringthe second trimester, . At the eighth week, the embryo is fully formed into atiny baby which is now a fetus. Body proportions begin to change as the limbsand trunk grow, reducing the head from one-half to one-fourth of the bodylength. The fetus is now able kick, curl its finger and toes, and squint itseyes. Genitals from to determine the sex of the fetus.
It also gains thegrasping reflex, which is familiar with new born babies. Through a stethoscope theheartbeat is able to be heard. During the third trimester The fetus becomes capable oflife outside the womb during the third trimester .
Fat beginsto build up, filling out a skinny body and preparing the baby for warmth in theworld outside the womb. During the last three months thebrain is developing rapidly . As you can see the female reproductive system is a verybig thing. The female body is capable of many things. But I think the mostinteresting part is creating a baby and holding it for nine months.
For all weknow the female reproductive system is way more then we know.