HUMAN BIOLOGY

reprodUCtIVe systeMs 315 fertilization Fusion of the nuclei of an egg and a sperm. ovum A mature egg. zygote The first cell of a ...

316 Chapter 16 preventing pregnancy refrain from intercourse during the woman’s fertile period, starting a few days before ovula ...

reprodUCtIVe systeMs 317 What are the most effective methods for preventing conception? The most effective methods for preventi ...

318 Chapter 16 in vitro fertilization Fertilization that occurs when oocytes and sperm are placed in a prepared laboratory dish. ...

reprodUCtIVe systeMs 319 hoW may assisted reproductive technologies help overcome infertility? Fertility drugs include hormones ...

320 Chapter 16 some Common sexually transmitted diseases enlarged and tender. Impaired lymph drainage can cause swelling in the ...

reprodUCtIVe systeMs 321 of the uterus (hysterectomy). A woman’s partner should also be treated, even if there are no symptoms. ...

322 Chapter 16 stds Caused by viruses and parasites Genital herpes is a lifelong infection Like HIV infections (Section 9.10), h ...

reprodUCtIVe systeMs 323 the only people who are not at risk of stds are those who are celibate (never have sex) or who are in a ...

324 Chapter 16 Cancers of the Breast and Reproductive System Chances for cure are excellent if breast cancer is detected early. ...

reprodUCtIVe systeMs 325 examine each testicle separately after a warm bath or shower (when the scrotum is relaxed). The testis ...

326 Chapter 16 asked to sign a contract that spells out legal rights and obligations of the parties. Once a potential donor is a ...

RepRoductive systems 327 corpus luteum degenerates, and the endometrial lining is shed through menstruation. Estrogen, progester ...

328 Chapter 16 A diagnosis of ovarian cancer often means surgery, chemotherapy, and radiation. Menopause results. An experimenta ...

This chapter builds on the principles of reproduction intro- duced in Chapter 16, including how hormones influence the menstrual ...

n Like all animals, humans begin life as a single cell from which tissues and organs soon begin to develop. n Links to Organ sys ...

Development anD aging 331 What are the first steps in embryonic development? Cleavage of the zygote into a ball of cells occurs ...

332 Chapter 17 (Figure 17.3D). The blastocyst has two tissues: a surface epi- thelium called the trophoblast (tropho- means “to ...

Development anD aging 333 FOCUS ON HEALTH after cleavage, What next developmental steps lead to implantation of the embryo? A b ...

334 Chapter 17 embryonic disk Pancake- shaped stage of an early embryo. neural tube The forerunner of an embryo’s brain and spin ...