Cleavage results in an increase in the number of cells

Cleavage results in an increase in the size of the embryo

Cleavage results in the formation of a Zygote then ultimately a Blastocyst

Cleavage results in the formation of a Morula then ultimately a Blastocyst

Cleavage results in the formation of a Morula then ultimately a Blastocele

Cleavage results in the formation of a Zygote then ultimately a Morula

Placental Mammals undergo only partial cleavage

Avian Animals undergo only partial cleavage

Avian Mammals have minimal yolk

Placental Mammals have minimal yolk

Tighter Junctions than the Embryonic Disc

GAP junctions allowing for better communication

Facilitates the absorption of nutrients

undergoes transformation to give 3 germ layers

surrounds the blastocele

Leads to the formation of 3 germ layers: Endoderm, Mesoderm, Ectoderm

Arises from Trophoblast rearrangement

Arises from Embryonic Disc rearrangement

The first cells that migrate through the primitive strike give rise to Endoderm

The first cells that migrate through the primitive strike give rise to Mesoderm

The first cells that migrate through the primitive strike give rise to Ectoderm

The Coelem establishes it self within the lateral mesoderm

The Coelem establishes it self within the Paraxial mesoderm

Somatic Mesoderm is attached to Endoderm

Splanchic Mesoderm is attached to Endoderm

Epidermis of Skin

Dermis of Skin

CNS

Adrenal Medulla

Visceral Pleura and Peritoneum

GIT

Parenchyma of the Liver

Lining of the Tarchea

Appendicular Skeleton

Uterus

Yolk Sac

Allantois

Visceral Pleura/Peritoneum

Myocardium

Amnion

Chorion

Parietal Pleura

Pericardium

Uterus

Renal Pelvis

Lining of GIT

Dermis of Skin

Lining of Larynx

Lining of Trachea

Urogenital Sinus

Renal Pelvis

Liver Parenchyma

Pancreas Parenchyma

Kidney Tubules

Amnion/Chorion

Part of it is derived from Mesoderm

Part of it is derived from Endoderm

Part of it is derived from the Trophoblast

Mediates the Attachment to the Uterus

It is a fluid filled sac that protects the embryo

Regresses over time in mammals

contributes primitive germ cells

derived from primitive gut

fluid filled sac that collects waste

A portion of it fuses with the Alantois

Derived from Endoderm

Derived from Mesoderm

Derived from the Trophoblast

mediates attachment to the uterus

is a fluid filled sac that protects the embryo

eventually fuses with the chorion

contributes primitive germ cells

derived from primitive gut

collects waste from the embryo

Regresses with time in mammals

Derived from Endoderm

Derived from Mesoderm

Derived from the Trophoblast

Mediates attachment to the Uterus

Fluid filled sac that protects the embryo

derived from the primitive gut

regressive with time in mammals

contributes primitive germ cells

fluid filled sac that collects waste

eventually fuses with the chorion