Chapter 21 Male and female reproductive systems Key points Chromosomal sex is determined at fertilisation. Primordial germ cells migrate to the genital ridge, which subsequently develops into the appropriate gonad and duct system for that sex. Two defined antagonistic pathways exist for sexual differentiation.
Why do women have orgasms? In a literature review recently published in the Journal of Evolutionary Zoologya pair of developmental evolutionary specialists posit that as the female reproductive system evolved, so did the role of the orgasm. But similar to vestigial organs like tonsils or appendix, the orgasm remained.
The vulva plural vulvas or vulvae; derived from Latin for wrapper or covering consists of the external female sex organs. The vulva includes the mons pubis or mons venerislabia majoralabia minoraclitorisvestibular bulbsvulval vestibuleurinary meatusthe vaginal openingand Bartholin's and Skene's vestibular glands. The urinary meatus is also included as it opens into the vulval vestibule.
The doctor said it to him. A husband stitch, or daddy stitch, is an extra stitch given during the repair process after a vaginal birth, supposedly to tighten the vagina for increased pleasure of a male sexual partner. Is it a myth? A hurtful joke?
Sign up. Illustrated anatomical parts with images from e-Anatomy and descriptions of anatomical structures. It is present from around the 12th week of gestation, and commences as a peritoneal outpouching.
Cervixlowest region of the uterus ; it attaches the uterus to the vagina and provides a passage between the vaginal cavity and the uterine cavity. The cervix, only about 4 centimetres 1. The cervical opening into the vagina is called the external os ; the cavity running the length of the cervix is the endocervical canal; the opening of the endocervical canal into the uterine cavity, the internal os.
MAN on the premises! Martha Morales, the evening supervisor at the Webster Apartments, a large, brick home to women of varying ages and occupations, strode down a long corridor lined with identical doors. She zeroed in on one of them and knocked.
The brush with Apple Computer's subtle sexism came when Hintze tried to engrave the following song lyric by Alix Olson on her new iPad:. This might not be your choice of iPad motto, but if Hintze wants that on her tablet, why quibble? It is called an iPad, after all, not a wePad or a prudishcommunitystandardsPad. But when Hintze tried to type in those lyrics, Apple balked.
Billy Crystal may have been shocked when Meg Ryan so effectively—and amusingly—faked an orgasm in a restaurant during the movie When Harry Met Sallybut surveys suggest only one-third of women are regularly fully aroused during intercourse. And although poor partner performance, psychological issues, or physiological shortfalls are often cited as the reason, two evolutionary biologists now offer a provocative new explanation. In a paper published today, they argue that female orgasm is an evolutionary holdover from an ancient system, seen in some other mammals, in which intercourse stimulated important hormonal surges that drive ovulation.
The vaginal process or processus vaginalis is an embryonic developmental outpouching of the parietal peritoneum. It is present from around the 12th week of gestation, and commences as a peritoneal outpouching. In males, it precedes the testes in their descent down within the gubernaculumand closes. This closure also called fusion occurs at any point from a few weeks before birth, to a few weeks after birth.