Animal Development Flashcards

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1
Q

What is a Zygote?

A

Fertilized egg cell. From a female gamete and male sperm.

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2
Q

Meroblastic VS Holoblastic clevage

A

Meroblastic= incomplete clevage. Where the cytoplasm divides but not the yolk.
Holoblastic= complete cleavage. Divides whole egg into Blastomeres.

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3
Q

What is Blastula?

A

Sphere shape cells that form during the development of embryo. Created by repeated cleavage production.

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4
Q

What is Blastocoel?

A

In Blastula stage. A fluid filled cavity.

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5
Q

What is Gastrulation?

A

When embryo transforms from a one dimesual layer (blastula) into multidimensional structure(gastrula).

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6
Q

What is Archenteron?

A

Tube like cavity that forms and it’s the primary gut of the embryo

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7
Q

What is Blastopore?

A

Opening of the embryo that becomes the mouth

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8
Q

What are the embryonic tissues:
Ectoderm?
Mesoderm?
Endoderm?

A

Germ layers formed in embryonic development.
Ectoderm= outer layer of cell, turns into skin
Mesoderm= middle layer of cell, Ames muscles cells
Endoderm= innermost layer of cell, produces gut and lungs

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9
Q

What is Neurulation?

A

Process of the neural plate

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10
Q

Neural plate?

A

The disk that separates the brain and spinal cord

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11
Q

Neural groove?

A

Grove on the neural plate between NEURAL FOLD and EMBRYO.

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12
Q

Neural fold?

A

Responsible for the front end of the neural tube

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13
Q

Neural tube?

A

The central nervous system, brain and spinal cord

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14
Q

Early cleavage?

A

The separation line of cells.
When it begins to separate.
Looks like a butt

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15
Q

Late cleavage?

A

Multiple bubble divisions

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16
Q

Shell?

A

The hard part around the egg that protects the bird

17
Q

Shell membrane?

A

Outer shell and inner shell membrane the white film of the eggs

18
Q

Egg albumin?

A

The white part of egg when boiled

19
Q

Chalaza?

A

A rope like that holds the yolk in the center

20
Q

Active cytoplasm?

A

When the cell is fertilized the cytoplasm begins it’s cell growth and replication

21
Q

Primitaive streak?

A

A line of Eliblast that goes from Tom to bottom of cell

22
Q

Somites?

A

Rib cage looking area of the bird