Human-Sexuality-1.docx

Which finally degenerates but first its releases its

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which finally degenerates, but first its releases its final hormones: progesterone, estrogen and some inhibit which stop the production of LSH and FH. - They also prepare the uterus to receive the oocyte which is now on its way down the fallopian tube where it might meet a sperm. - The fallopian tubes are made of sheets of smooth muscle and a highly folded mucosa layer. - Only if the egg is fertilized by a sperm does it complete meiosis II and becomes an ovum. - Whether the egg is fertilized or not it works its way down the tube into the uterus. The uterus is anterior to the rectum and posterior superior to the bladder and ends with the cervix. - The uterus is composed of three layers the perimetrium on the outside, the bulky, smooth muscle the myometrium that contracts during labour and the inner mucosal lining called the endometrium that consists of an inner layer and an outer functional layer. - If fertilization does happen the embryo with snuggle into the endometrium for gestation. The uterus is only susceptible to implantation for a short time. (about a week after ovulation). If the egg isn’t fertilized the outer layer sloughs off. (first phase of the menstrual cycle) - Menstrual cycle is the series of events that the endometrium goes through in response to changing hormone levels ever 28 days. - The shedding of the functional layer is triggered when estrogen and progesterone that were being produced by the corpus luteum start to drop about 10 days after ovulation (this stage lasts about 5 days) - The FSH and the LH released by the pituitary start to rise again stimulating the next round of follicles that begin to make estrogen. (menstrual phase) - Days 6-14 the rising estrogen levels and the follicles stimulate the regeneration of the endometrium and creates a cushy habitat for another potential egg. (proliferative phase) - After the egg is released the final secretory phase or post-ovulatory phase begins. Sexual Differentiation - The default human being is female. The male comes from a single gene. - The Sequence is the code for human beings. How we are born, how we die etc. - The Genetics of sex are almost always determined at birth. - 23 pairs of chromosome. 23 is from the parents. Sperm carries either an x or a y. if the chromosome is x it means that you will be a female. - A typical chromosome has 1000 genes but the Y gene only has about 26. The SRY is the determinant of the structural sex. If the SRY gene is present it will start the process of creating a teste. - There are three types of genes on the testes the SRY is one of them. - 1 in every 4000 boys is born with a whole in their gene which causes infertility.
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Female Genitals: External Genitals The vulva is the term for the external female genitalia. It includes the mons pubis, labia’s, external components of the clitoris, urethral opening (also known as the urinary meatus), hymen and vestibular glands.
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