Match each term with the correct description below.
a. Fertilization
b. Zygote
c. Cleavage
d. Acrosomal reaction
e. Blastocyst
f. Human chorionic gonadotropin (hCG)
g. Innercell mass
h. Ectoderm
i. Endoderm
j. Mesoderm
k. Chorionicvill
l. Placenta
m. Amnion
n. Umbilical cord
o. Relaxin
p. Parturition
q. False labor
r. Cesarean (C) section
s. Afterbirth
t. Menarche
u. Blastocyst cavity
v. Labor
Pairs
a. Stalk of tissue containing blood vessels attached to the placenta
b. Childbirth
c. Germ layerwhich forms mucosa and associated glands
d. Large fluid-filled sphere inside of a blastocyst
e. Embryonictissue projections that will combine with tissue from the uterine lining to form the placenta
f. Series of events that expel the bay from the uterus
g. Single cell containing 46 chromosomes formed form the union of an ovum and sperm
h. Hormone that causes ligaments of the pelvis and pubic symphysis to relax
i. Early stage of embryonic development in which they zygote undergoes rapid mitotic divisions
j. Hollow, sphere-shaped ball of cells with an innercell mass
k. Hormone produced by cells surrounding a developing embryo which causes the corpus lute um of the ovary to continue to produce other hormones that sustain pregnancy
I. Germ layer which becomes the nervous system and the epidermis of the skin
m. Event marking the moment the genetic material of a sperm joins with that of an ovum to form a fertilized egg
n. Temporary organ that provides nutrients and oxygen to the developing fetus, carries away wastes, and produces the hormones of pregnancy
o. Thin, tough, membranous sac that encloses the embryo or fetus
p. Small cluster of cells inside of a blastocyst
q. Germ layer which gives rise to the digestive tract, the heart and skeletal muscles, red blood cells, and the tubules of the kidneys, as well as a type of connective tissue called mesenchyme
r. Event in which sperm release enzymes and proteases when they are near an oocyte
s. Weak, irregular uterine contractions that do not lead to delivery of a baby
t. Placenta and attached fetal membranes expelled following delivery of the baby
u. Event represented by the occurrence of the first menstrual period
v. Delivery of an infant through surgical incision
