chapter 34b bio test | matching test no. 1

ovulation / 1

the release of an ovum from the ovary

ovulation / 2

occurs once every 28 days

endometrium / 1

the lining of the uterus

endometrium / 2

is well-supplied with blood vessels that nourish the developing embryo

menstrual cycle / 1

a regular sequence of events involving the ovaries, endometrium, and endocrine system

menstrual cycle / 2

is regulated by hormones made by the hypothalamus, pituitary, and ovaries

menstrual cycle / 3

is controlled by feedback mechanisms

menstrul cycle / 4

occurs generally within a 28-day time period

menstruation / 1

if fertilization has not occurred low levels of estrogens and progesterone cause the endometrium to detach from the uterine walls

menstruation / 2

the endometrial tissue, along with blood and the unfertilized egg, are discharged through the vagina

fertilization / 1

the union of egg and sperm

fertilization / 2

occurs in the Fallopian tube

fertilization / 3

creates a zygote

zygote

the diploid cell that results from the union of the egg and sperm

implantation / 1

occurs about 6-7 days after fertilization

implantation / 2

the developing embryo attaches to the wall of the uterus and begins to grow into the tissues of the mother

amnion

contains amnionic fluid which cushions and protects the embryo

chorion / 1

surrounds the amnion

chorion / 2

makes the contact with the tissue of the uterus

chorionic villi / 1

small, finger-like projections of the chorion

chorionic villi / 2

the site of exchange of substances between the maternal and the fetal blood

placenta / 1

the combination of the chorionic villi and the uterine lining

placenta / 2

the connection between the mother and the embryo

placenta / 3

acts as the embryo’s organ of respiration, nourishment, and excretion

umbilical cord / 1

the point of attachment between the embryo and the placenta

umbilical cord / 2

contains two arteries and one vein