Biology Chapter 34B Matching Test 1

ovulation

The release of an ovum from the ovary

ovulation

Occurs once every 28 days

endometrium

The lining of the uterus

endometrium

Well-supplied w/ blood vessels that nourish the developing embryo

menstrual cycle

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

menstrual cycle

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

mentrual cycle

Is controlled by feedback mechanisms

menstrual cycle

Occurs, generally, within a 28-day time period

mentruation

If fertilization has not occured low levels of estrogens and progesterone cause the endometrium to detach from the uterine wall

menstruation

The endometrial tissue, along w/ blood and fertilized egg, are discharged through the vagina

fertilization

The union of egg and sperm

fertilization

Occurs in the Fallopian tube

fertilization

Creates a zygote

zygote

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

implantation

Occurs about 6-7 days after (fertilization)

implantation

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

amnion

contains amniotic fluid which cusions and protects the embryo

chorion

surrounds the amnion

chorion

makes direct contact w/ the tissue of the uterus

chorionic villi

Small, finger-like projections of the chorion

chorionic villi

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

placenta

the combination of the chorionic villi and uterine lining

placenta

the connection between the mother and embryo

placenta

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

umbilical cord

the point of attachment between the embryo and the placenta

umbilical cord

contains two arteries and one vein