Embryogenesis

zona pellucida

Where do all embryogenic reaction occur in the cell

fusion of gametes

• transmit genes from parent to offspring

• initiate organism development inside cytoplasm

What are the 2 functions of fertilization

embryo

a conceptus in the early stage of development with no anatomical difference

2n

full chromosome number

n

half chromosome number

• development inside the zona pellucida

• hatching of blastocyst in zona pellucida

• formation of placenta

• maternal recognition

Before an embryo attaches to the uterus what must occur

blastomere

each cell of an embryo is called a

morula

A solid ball of cells is called

no

During the morula phase does the embryo undergo growth

gap junction

The inner cells of the morula cells begin to form a space called

tight junctions

THe outer cells of the morula cells begin to form a mass called (allows for fluid accumilations

blastocoele

The cavity (space) inside the morula

trophoblast

THe outer cell mass of the morula

embryoblast

The inner cell mass of morula

fetus

THe inner cell mass also known as the mesoderm develops into what part of the fertilized animal

chorion and partial placenta

The outer mass also known as trophectoderm develops into what oart of the fertilized animal

Blastocyst

WHat is the first stage that the embryo grows in size

ectoderm, mesoderm, and endoderm

What are the 3 germ layers

gastrulation

THe process of a hole forming in a mature cell

ectoderm

What germ cell layer forms the skin and nervous system

mesoderm

What germ cell layer forms the muscles, skeleton, gonads, circulatory, etc

endoderm

WHat germ cell layer forms liver, pancreas, lungs, digestive tract

1st

In what trimester can a pregnancy sex be determined

cortical reaction

WHat recation stops multiple sperms from entering

perivitelline space

WHat controls the regulation of sperm into the eggs cell

polyspermy

WHat is it called when multiple sperm fertilize an egg

acrosome

WHat part of the sperm cell is DNA released from

polar body

WHen 1 oocyte takes the most of the cytoplasm and is considered “unviable” what is it called

differentiated embryoblasts, trophoblasts and blastocoele

What is the blastocyst made of

animal pole

The fast dividing cells are on what pole

vestible

THe slow dividing cells are on what pole

posterior lobe

THis part of the pituitary gland originated from neural tissue of the brain

Infundibilum

THis develops from the brain floor of fetus

rathke’s pouch

THis develops from the roof of the mouth of the fetus

posterior lobe

THe neurohypophysis of an embryo is called

hypophysis

The pituitary gland of an embryo is called t

sella turcica

WHat is the protective layer of the pituitary called (sphenoid bone)

placenta

WHat does the fetus use to assist in attachment ti the uterus

placenta

This grows after embryo hatching

anterior and posterior lobes

Where is FSH released from

posterior lobe

WHere is oxytocin released from

high

Are progesterone levels high or low at the time of placental growth