Embryology Flashcards

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1
Q

Morula

A

Solid ball of cells, formed after implantation

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2
Q

Blastula

A

From morula. Hallow ball of cells single layer thick. Contains blastocoel (fluid secreted by cells).

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3
Q

Two layer gastrula

A

“Inpocketing,” endoderm inside, ectoderm on exterior.

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4
Q

Three layer gastrula

A

Mesoderm forms between ectoderm and endoderm.

Formation and rearrangement of the three germ layers is known as gastrulations.

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5
Q

Ectoderm

A

Skin and sweat glands, eyes, hair, teeth, nervous system

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6
Q

Mesoderm

A

Musculoskeletal system, circulatory system, kidneys (excretory-bladder lining), gonads, dermis

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7
Q

Endoderm

A

Lining of digestive and respiratory tracts, lining of bladder, pancreas, and liver.

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8
Q

Chorion

A

Lines inside of egg shell, permits gas exchange

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9
Q

Allantois

A

Sac developed from digestive tract, carries out respiration and excretion, has many blood vessels

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10
Q

Amnion

A

Encloses amniotic fluid, watery environment for embryo

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11
Q

Yolk sac

A

Encloses yolk. Blood vessels in yolk transfer food to developing embryo.

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