Words fill in blank

Fertilization

The process in which a sperm and egg unite to form a zygote is called ______?

Ovulation

The release of an egg from the ovary is called ________?

Corona radiata

The outer layer of cells surrounding the ovulated egg is the _____?

Zona pellucida

The glycoprotein layer surrounding the egg is the ________?

Cleavage

Rapid mitotic divisions of the zygote are called _______?

Blastomeres

Cells produced during cleavage are called ________?

Morula

The solid ball of approximately 16 or more cells is called a ______?

Blastocyst

The hollow ball of cells that forms after the morula stage is the ________?

Inner cell mass

The group of cells inside the blastocyst that develops into the embryo is the ______?

Implantation

The process by which the blastocyst embeds into the uterine lining is called _______?

Endometrium

The lining of the uterus is called the _______?

Epiblast

The upper layer of the bilayer embryonic disc is the _____?

Hypoblast

The lower layer of the bilayer embryonic disc is the ______?

Amnion

The membrane that eventually surrounds the embryo in a fluid-filled sac is the _______?

Amniotic fluid

The fluid surrounding the embryo is called ________?

Yolk sac

The first extraembryonic membrane to appear is the ________?

Chorion

The outermost extraembryonic membrane is the _______?

Allantois

The membrane that contributes to formation of the umbilical cord and urinary bladder is the ______?

Placenta

The organ through which nutrients, gases, and wastes are exchanged between mother and fetus is the _______?

Umbilical cord

The structure connecting the embryo/fetus to the placenta is the ______?

Gastrulation

The process that forms the three primary germ layers is called _______?

Gastrula

The embryo during gastrulation is called a ________?

Ectoderm

The germ layer that forms the nervous system and epidermis is the _______?

Mesoderm

The germ layer that forms muscles, bones, connective tissue, and the cardiovascular system is the ________?

Endoderm

The germ layer that forms the epithelial lining of the digestive and respiratory tracts is the ______?

Primitive streak

Cells migrate through the __________ during gastrulation.

Organogenesis

The process of organ formation is called ________?

Neurulation

The first major event in ectoderm specialization is _______?

Neural tube

The structure that develops into the brain and spinal cord is the ________?

Hindbrain

The three primary brain vesicles are the forebrain, midbrain, and _______?

Notochord

The rod-like structure that serves as the embryo’s first axial support is the _______?

Somites

The paired blocks of mesoderm that give rise to vertebrae, skeletal muscle, and dermis are called _______?

Ductus venosus

The fetal vessel that allows blood to bypass the liver is the _______?

Foramen ovale

The opening between the right and left atria of the fetal heart is the ______?

Ductus arteriosus

The fetal vessel that allows blood to bypass the lungs is the ______?

gastrulation

During _____ the bilaminar embryonic disc is converted into a trilaminar embryonic disc.