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Embryology > Fertilisation > Flashcards

Fertilisation Flashcards

1
Q
A

Outer Shell Membrane

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2
Q
A

Thin Albumen

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3
Q
A

Thick Albumen

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4
Q
A

Nucleus

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5
Q
A

Air Sac

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6
Q
A

Chalaza

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7
Q
A

Oocyte Membrane (Not normally visible)

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8
Q

The Four Estrus Cycles

A

Monoestrus (Fox/Bear)

Polyestrus (Menstrual Cycle, humans)

Seasonally Polyestrus (Long/short day breeders)

Diestrus (Twice a year)

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9
Q
A

Magnum/Ampulla

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10
Q
A

Isthmus

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11
Q
A

Infundibulum

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12
Q

Give the 7 Stages of Fertilisation

A
  1. Acrosome Reaction
  2. Acrosome binds with zona pellucida
  3. Membrane Binding
  4. Cortical membranes fuse with Oocyte membrane
  5. Cortical Reaction
  6. Hardened Zona Pellucida
  7. Polyspermy Block
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13
Q

What is Cleavage?

A

Repeated mitotic division, forming blastomeres.

As they build, they form a morula and eventually a Blastula.

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14
Q

Give the four planes of cleavage.

A

Meridional

Vertical

Equatorial

Lattitudinal

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15
Q

What is happening in this diagram?

A

The Blastocyst is hatching from the zona pellucida and is embedding itself into the endometrium.

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16
Q

1

A

Mesoblast

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17
Q

6

A

Hypoblast

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18
Q

5

A

Lacunae

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19
Q

7

A

Heuser’s Membrane

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20
Q

7

A

Heuser’s Membrane

21
Q

6

22
Q

4

A

Cytotrophoblast

23
Q

3

A

Primary Umbilical Vesicle

24
Q

5

25
Q

Give the three patterns of implantation shown.

A

Centric

Eccentric

Interstitial

26
Q

Name the blue region.

27
Q

Name the yellow region.

A

Umbilical Vesicle (Yolk Sac)

28
Q

1

A

Primitive Streak

29
Q

2

A

Primitive Pit

30
Q

3

A

Primitive Node

31
Q

4

A

Oropharangeal Membrane

32
Q

5

A

Cardiogenic Plate

33
Q

7

34
Q

8

35
Q

9

A

Cloacal membrane

36
Q

1

A

Primitive Streak

37
Q

2

38
Q

3

A

Extraembryonic Mesoblast

39
Q

6

40
Q

What is the Allantois?

A

Sac structure involved in nutrition and excretion of the embryo

41
Q

What is a somite?

A

A division of the body or an embryo.

42
Q

Which cells are formed by Ectoderm?

A

Skin

Nerves

Pigment

43
Q

Which cells are produced by mesoderm?

A

Muscle

Red Blood Cells

44
Q

What do endoderm cells produce?

A

The internal organs

45
Q

A

A

Paraxial Mesoderm (Seperates to form Somites)

46
Q

B

A

Intermediate Mesoderm

47
Q

C

A

Lateral Plate Mesoderm

48
Q

The endoderm is split into which three regions?

A

Foregut, Midgut and Hindgut

Embryology (4 decks)

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