Animal Breeding Fertalisation Flashcards
What is zona Pellucida?
Inner layer of ovum very tough membrane
What dose the Acrosome on the sperm do?
Digestive protein is released here used to penetrate Ovum membrane
What dose the Mitochondria on sperm do?
Release energy for moving and swimming
Fertilisation takes place in?
Fallopian tubes
What is an Ovum called once it is fertalised?
Zygoate
When the first sperm penetrate corona radita and zona pellucida what happens?
Causes Fertilisation reaction
No other sperm can can penetrate ovum
The nucleus and ova fuse Miosis begins
The morula develops a cavity with a cell mass towards one end of the structure called??
The inner cell mass cavity is lined with Trophoblasts
Eventually forms the embryo
What are the 3 germ layers?
- Ectoderm
- Mesoderm
- Endoderm
What dose the ectoderm layer do?
Becoms skin and nervous system
There are 2 protective layers surrounding the Ovum what are they?
- Inner layer - Zona Pellucida
* outer layer - corona radita
What dose the mesoderm layer do?
Becomes Musko skeletal system and internal organs
What dose the Endoderm layer do?
Forms the lining of gastro intestinal track + other internal organs
What dose the Allantosis layer do?
Involved in the exchange of gasses + handles liquid waste
How long dose implantation take in a dog?
14-20 days after ovulation
How long dose implantation take in the cat?
11-16 days after Ovulation
What dose the extra Embryotic membrane consist of?
- yolk sac
- chorion
- Amnion
- Allantosis
What is the Allantois?
The pouch sac (Deverticulum)
What is the Urachus?
Canal that drains urinary bladder of the foetus
The outer membrane of the pouch sac is called?
The chrion
The inner membrane of the pouch sac is called?
The Amnion
After pouch sac fuses the outer membrane is now called?
The Chario-allantosis
After pouch sac has fused the inner membrane layer is now called?
Allanto amonion
What is the function of the placenta?
Provides Embryo with oxygen, food and removes waste products
There are narrow bands between placenta and extra-embryonic membrane are called?
Marginal Haematoma
The fluid in the marginal Haematoma is responsible for the vaginal discharge at parturition how dose the cat and dogs differ?
Bitches - Green
Queens - Brown
How many mammary glands do bitches, Queens and males have?
Bitches- 5pairs
Queens- 4pairs
Males - rudimentary teats
During pregnancy mammary glands ??
Become active + enlarges towards end of pregnancy
The hormone prolactin stimulates mammary secretions or milk
