Ch 16 bio

cap at the anterior end of a sperm that partially covers the nucleus and contains enzymes that help the sperm penetrate the egg

prevents either fertilization or implantation of an embryo in the uterine lining

oral contraceptive containing estrogen and progesterone

either of two small structures located below the prostate gland in males; each adds secretions to semen

narrow end of the uterus, which projects into the vagina

sore that appears on the skin; first sign of syphilis

sexually transmitted disease caused by the bacterium Chlamydia trachomatis; can lead to pelvic inflammatory disease

removal of the prepuce (foreskin) of the penis

medication or device used to reduce the chance of pregnancy

birth control method using synthetic progesterone; prevents ovulation by disrupting the ovarian cycle

birth control method using progesterone or estrogen and progesterone together; prevents ovulation by disrupting the ovarian cycle

under development, this birth control method immunizes against the hormone HCG, crucial to maintaining implantation of the embryo

yellow body that forms in the ovary from a follicle that has discharged its secondary oocyte; it secretes progesterone and some estrogen

dome-shaped horizontal sheet of muscle and connective tissue that divides the thoracic cavity from the abdominal cavity. also, a birth control device consisting of a soft rubber or latex cup that fits over the cervix

female gamete having the haploid number of chromosomes fertilized by a sperm, the male gamete

mucous membrane lining the interior surface of the uterus

coiled tubule next to the testes where sperm mature and may be stored for a short time

failure of the penis to achieve or maintain erection

female sex hormone that helps maintain sex organs and secondary sex characteristics

large polyurethane tube with a flexible ring that fits onto the cervix. functions as a contraceptive and helps minimize the risk of transmitting infection

small bristlelike fiber on the surface of a bacterial cell, which attaches bacteria to a surface

structure in the ovary that produces a secondary oocyte and the hormones estrogen and progesterone

hormone secreted by the anterior pituitary gland that stimulates the development of an ovarian follicle in a female or the production of sperm in a male

haploid sex cell; the egg or a sperm, which join in fertilization to form a zygote

hormone secreted by the hypothalamus that stimulates the anterior pituitary to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH)

hormone produced by the chorion that functions to maintain the uterine lining

attachment and penetration of the embryo into the lining of the uterus (endometrium)

inability to have as many children as desired

hormone-secreting cell located between the seminiferous tubules of the testes

birth control device consisting of a small piece of molded plastic inserted into the uterus; believed to alter the uterine environment so that fertilization does not occur.

hormone that controls the production of testosterone by interstitial cells in males and promotes the development of the corpus luteum in females

sheath used to cover the penis during sexual intercourse; used as a contraceptive and, if latex, to minimize the risk of transmitting infection

termination of the ovarian and uterine cycles in older women

loss of blood and tissue from the uterus at the end of a uterine cycle

production of an egg in females by the process of meiosis and maturation

monthly follicle changes occurring in the ovary that control the level of sex hormones in the blood and the uterine cycle

female gonad that produces eggs and the female sex hormones

tube that transports eggs to the uterus; also called uterine tube

release of a secondary oocyte from the ovary; if fertilization occurs, the secondary oocyte becomes an egg

analysis done on cervical cells for detection of cancer

external organ in males through which the urethra passes; also serves as the organ of sexual intercourse

structure that forms from the chorion and the uterine wall and allows the embryo, and then the fetus, to acquire nutrients and rid itself of wastes

female sex hormone that helps maintain sex organs and secondary sex characteristics

gland located around the male urethra below the urinary bladder; adds secretions to semen

pouch of skin that encloses the testes

thick, whitish fluid consisting of sperm and secretions from several glands of the male reproductive tract

convoluted structure attached to the vas deferens near the base of the urinary bladder in males, adds secretions to semen

long, coiled structure contained within chambers of the testis; where sperm are produced

cell associated with developing germ cells in seminiferous tubule; secretes fluid into seminiferous tubule and mediates hormonal effects on tubule

male gamete having a haploid number of chromosomes and the ability to fertilize an egg, the female gamete

production of sperm in males by the process of meiosis and maturation

male gonads that produce sperm and the male sex hormones

male sex hormone that helps maintain sexual organs and secondary sex characteristics

method for preventing pregnancy in which the uterine tubes are cut and sealed

tubular structure that receives urine from the bladder and carries it to the outside of the body

monthly occurring changes in the characteristics of the uterine lining (endometrium)

organ located in the female pelvis where the fetus develops; also called the womb

organ that leads from the uterus to the vestibule and serves as the birth canal and organ of sexual intercourse in females

tube that leads from the epididymis to the urethra in males

method for preventing pregnancy in which the vasa deferentia are cut and sealed

external genitals of the female that surround the opening of the vagina

diploid cell formed by the union of sperm and egg; the product of fertilization