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Bio CH24

Biology CH24 Animal Reproduction

estrogen a female hormone
estrous cycle a cycle in which a female will mate only at certain times
external fertilization the joining of egg and sperm outside the body
internal fertilization the joining of egg and sperm inside the female’s body
menstrual cycle the monthly changes that take place in the female reproductive organs
menstruation the loss of cells from the uterine lining, blood, and egg
oviduct tube-like organs that connect the ovaries to the uterus
penis places sperm in vagina during mating
regeneration reproduction in which the parent separates into two or more pieces and each piece forms a new organism
reproductive system the body system used to produce offspring
sexually transmitted disease those diseases transmitted through sexual contact
scrotum the sac that holds the testes
uterus a muscular organ in which the fertilized egg develops
vagina a muscular tube that leads from outside the female’s body to the uterus
vas deferens carries sperm from testes to urethra