matching test #1

Ovulation

The release of ovum from the ovary.

Ovulation

Occurs every 28 days.

Endometrium

The lining of the uterus.

Endometrium

Is 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 hormones made by the hypothalamus pituitary, and ovaries.

Menstrual Cycle

Is controlled by feedback mechanisms.

Menstrual Cycle

Occurs, generally, within a 28-day time period.

Menstruation

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

Menstruation

The endometrial tissue, along with blood and the unfertilized 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 cushions and protects the embryo.

Chorion

Surrounds the amnion.

Chorion

Makes direct contact with 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 the uterine lining.

Umbilical cord

The connection between the mother and the embryo. 

Umbilical cord

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.