Luther Prep Biology Chapter 34

Front 1

adolescence

Back 1

period of life beginning at puberty and ending at adulthood

Front 2

adulthood

Back 2

period of life when a person is fully developed and physical growth stops

Front 3

amniotic sac

Back 3

fluid-filled organ that cushions and protects the developing embryo of some vertebrates

Front 4

blastocyst

Back 4

stage of development during which the zygote consists of a ball of cells

Front 5

childhood

Back 5

periods of life from age two unit puberty

Front 6

corpus luteum

Back 6

follicle after ovulation; also called a yellow body because of its yellow color

Front 7

embryo

Back 7

stage of development after the fertilized cell implants into the uterus but before the cells take on a recognizable shape

Front 8

endometrium

Back 8

lining of the uterus

Front 9

epididymis

Back 9

coiled tube through which sperm leave the testes and enter the vas deferens

Front 10

estrogen

Back 10

steroid hormone that is found in greater quantities in women and men and contributes to female sexual characteristics and development

Front 11

fallopian tube

Back 11

tube of connective tissue that attaches the overt to the uterus in the female reproductive system and in which fertilization occurs

Front 12

fetus

Back 12

unborn offspring from the end of the eights week after conception to the moment of birth

Front 13

follicle

Back 13

collection of cells that surround and nourishes an egg while it is in the ovary

Front 14

infancy

Back 14

period of life from birth until the ability to walk has been acquired

Front 15

infertility

Back 15

persistant condition in which offspring cannot be produced

Front 16

menopause

Back 16

periods of life when the female reproductive system permanently stops the menstrual cycle

Front 17

menstrual cycle

Back 17

series of changes in the female reproductive system that takes place over the douse of one month

Front 18

ovary

Back 18

organ in which female gametes develop prior to fertilization

Front 19

ovulation

Back 19

process by which an egg is released from the ovary and becomes available for fertilization

Front 20

ovum

Back 20

egg cell that is produced by the female reproductive system

Front 21

placenta

Back 21

organ that developed in female mammals during pregnancy and carries nutrients from the mother to the embryo

Front 22

puberty

Back 22

stage of adolescence that is marked by the production on hormones involved in reproduction

Front 23

reproductive system

Back 23

body system that allows for sexual reproduction; includes testes, ovaries, and other male and female sex organs

Front 24

scrotum

Back 24

skin that encloses the testes outside of the male body

Front 25

semen

Back 25

white substance that contains sperm and fluids produced by sex glands of the male reproductive system

Front 26

sexually transmitted disease

Back 26

disease that is passed from one person to another during sexual contact

Front 27

testis

Back 27

organ of the male reproductive system that produces sperm

Front 28

testosterone

Back 28

steroid hormone that is found in greater quantities in men than in women and contributes to male sexual characteristics and development

Front 29

trimester

Back 29

one of the three periods of approximately three months each into which a human pregnancy is divided

Front 30

umbilical cord

Back 30

structure that connects an embryo to its mother and provides the embryo with nourishment and waste removal

Front 31

uterus

Back 31

organ of the female reproductive system in which a fertilized egg attaches and a fetus develops

Front 32

vas deferens

Back 32

duct in which sperm mixes with other fluids before reaching the urethra

Front 33

zygote

Back 33

cell that forms when a male gamete fertilizes a female gamete