bio

endometrium

-The lining of the uterus

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

cervix

• Narrow lower end of the uterus

vagina

-birth canal

-opens to outside the body

-allows entry of the sperm

-allows exit of the baby

menstrual cycle

-a regular sequence of events involving the ovaries and the endocrine system

Feedback mechanism

-occurs when an increase in a substance causes the mechanism that produces that substance to slow down production

menstruation

-if fertilization has no occured, low levels of estrogens and progesterone cause the (endometrium) to detach from the uterine lining

-The tissue, along with blood and the egg are discharged

fertilization

-union of egg and sperm

-occurs in fallopian tube

-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)

-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