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The Developing Animal > Animal Breeding Fertalisation > Flashcards

Animal Breeding Fertalisation Flashcards

1
Q

What is zona Pellucida?

A

Inner layer of ovum very tough membrane

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2
Q

What dose the Acrosome on the sperm do?

A

Digestive protein is released here used to penetrate Ovum membrane

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3
Q

What dose the Mitochondria on sperm do?

A

Release energy for moving and swimming

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4
Q

Fertilisation takes place in?

A

Fallopian tubes

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5
Q

What is an Ovum called once it is fertalised?

A

Zygoate

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6
Q

When the first sperm penetrate corona radita and zona pellucida what happens?

A

Causes Fertilisation reaction

No other sperm can can penetrate ovum

The nucleus and ova fuse Miosis begins

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7
Q

The morula develops a cavity with a cell mass towards one end of the structure called??

A

The inner cell mass cavity is lined with Trophoblasts

Eventually forms the embryo

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8
Q

What are the 3 germ layers?

A
  • Ectoderm
  • Mesoderm
  • Endoderm
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9
Q

What dose the ectoderm layer do?

A

Becoms skin and nervous system

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10
Q

There are 2 protective layers surrounding the Ovum what are they?

A
  • Inner layer - Zona Pellucida

* outer layer - corona radita

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11
Q

What dose the mesoderm layer do?

A

Becomes Musko skeletal system and internal organs

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12
Q

What dose the Endoderm layer do?

A

Forms the lining of gastro intestinal track + other internal organs

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13
Q

What dose the Allantosis layer do?

A

Involved in the exchange of gasses + handles liquid waste

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14
Q

How long dose implantation take in a dog?

A

14-20 days after ovulation

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15
Q

How long dose implantation take in the cat?

A

11-16 days after Ovulation

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16
Q

What dose the extra Embryotic membrane consist of?

A
  • yolk sac
  • chorion
  • Amnion
  • Allantosis
17
Q

What is the Allantois?

A

The pouch sac (Deverticulum)

18
Q

What is the Urachus?

A

Canal that drains urinary bladder of the foetus

19
Q

The outer membrane of the pouch sac is called?

A

The chrion

20
Q

The inner membrane of the pouch sac is called?

A

The Amnion

21
Q

After pouch sac fuses the outer membrane is now called?

A

The Chario-allantosis

22
Q

After pouch sac has fused the inner membrane layer is now called?

A

Allanto amonion

23
Q

What is the function of the placenta?

A

Provides Embryo with oxygen, food and removes waste products

24
Q

There are narrow bands between placenta and extra-embryonic membrane are called?

A

Marginal Haematoma

25
Q

The fluid in the marginal Haematoma is responsible for the vaginal discharge at parturition how dose the cat and dogs differ?

A

Bitches - Green

Queens - Brown

26
Q

How many mammary glands do bitches, Queens and males have?

A

Bitches- 5pairs

Queens- 4pairs

Males - rudimentary teats

27
Q

During pregnancy mammary glands ??

A

Become active + enlarges towards end of pregnancy

The hormone prolactin stimulates mammary secretions or milk

The Developing Animal (4 decks)

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