By Richard E. Jones and Kristin H. Lopez (Auth.)
The fourth version of Human Reproductive Biology emphasizes the organic and biomedical features of human copy, explains advances in reproductive technology and discusses the alternatives and issues of this day. Generously illustrated in complete colour, the textual content presents present information regarding human reproductive anatomy and body structure. This expansive textual content covers the total variety of issues in human copy, from the biology of female and male structures to notion, being pregnant, hard work and start. It is going directly to disguise matters in fertility and its keep watch over, inhabitants progress and relations making plans, precipitated abortion and sexually transmitted illnesses. this is often the perfect ebook for classes on human reproductive biology, with bankruptcy introductions, sidebars on comparable issues, bankruptcy summaries and recommendations for extra reading.
- fantastically redrawn full-color illustrations supplement thoroughly up-to-date fabric with the newest examine effects, and transparent, logical presentation of topics
- Covers the fundamental technology of copy - endocrinology, anatomy, body structure, improvement, functionality and senescence of the reproductive method - in addition to utilized elements together with birth control, infertility and ailments of the reproductive system
- New better half site positive factors full-color illustrations as PPT and jpeg records for either professors and scholars to take advantage of for examine and shows
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The variation in breast size and shape is due mostly to differences in the amount and distribution of fat; breast size does not affect the ability to secrete milk. 13). The latter tissue (suspensory ligaments of Cooper) provides support for the breast, but it tends to be less effective in older women. 14). The alveolus is the functional unit of the mammary gland. It is a hollow sphere of milk-secreting cells. Each alveolus receives an extensive blood supply, which provides raw materials for milk synthesis and transports the hormones that control alveolar growth and function.
ADULT FEMALE AND MALE REPRODUCTIVE SYSTEMS 42 2. THE FEMALE REPRODUCTIVE SYSTEM secreted in the breasts. It provides nutrients and protects the infant against certain infections, especially those of the digestive tract (see Chapter 12). Suckling Chapter 12 describes how suckling of the nipple maintains prolactin secretion, which causes milk secretion in previously primed mammary tissue. We also see how nursing stimulates the release of oxytocin, which causes ejection of milk from the nipple. 14).
2). It functions as a passageway for the menstrual flow, as a receptacle for the penis during coitus, and as part of the birth canal. The wall of the vagina has folds that allow it to stretch during coitus or childbirth; it is normally collapsed. The vaginal canal leads from the vulva (external genitalia) to the external cervical os. The opening of the external cervical os into the vagina is circumscribed by a recess called the fornix. This recess allows support for a diaphragm contraceptive (see Chapter 13).