Sexual Structures

Sexual Structures - a luteal phase (presence of the corpus...

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Sexual Structures Sperm pass through the vas deferens and connect to a short ejaculatory duct that connects to the urethra . The urethra passes through the penis and opens to the outside. Secretions from the seminal vesicles add fructose and prostaglandins to sperm as they pass. The prostate gland secretes a milky alkaline fluid. The bulbourethral gland secretes a mucus-like fluid that provides lubrication for intercourse. Sperm and secretions make up semen . The Female Reproductive System The female gonads, ovaries, are located within the lower abdominal cavity.
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The ovary contains many follicles composed of a developing egg surrounded by an outer layer of follicle cells. Each egg beginsoogenesis as a primary oocyte . At birth
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each female carries a lifetime supply of developing oocytes, each of which is in Prophase I. A developing egg (secondary oocyte) is released each month from puberty until menopause, a total of 400-500 eggs. Ovarian Cycles After puberty the ovary cycles between a follicular phase (maturing follicles) and
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Unformatted text preview: a luteal phase (presence of the corpus luteum ). These cyclic phases are interrupted only by pregnancy and continue until menopause, when reproductive capability ends. The ovarian cycle lasts usually 28 days. During the first phase, the oocyte matures within a follicle. At midpoint of the cycle, the oocyte is released from the ovary in a process known as ovulation . Following ovulation the follicle forms a corpus luteum which synthesizes and prepares hormones to prepare the uterus for pregnancy. The secondary oocyte passes into the oviduct (fallopian tube or uterine tube). The oviduct is connected to the uterus. The uterus has an inner layer, the endometrium , in which a fertilized egg implants. At the lower end of the uterus the cervix connects the uterus to the vagina . The vagina receives the penis during intercourse and serves as the birth canal....
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Sexual Structures - a luteal phase (presence of the corpus...

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