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13 Cards in this Set
- Front
- Back
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What is embryology? |
It us branch of animal biology that deals with prenatal tage of development beginning from gamets formation, fertilization,zygote formation , embryo and fetus development to the birth of a new individual |
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What is the two periods befor birth? |
Fatal period and embryonic period. |
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What is embryonic period ? |
It is period which last 2 months begining from zygote formation also organogensis occurs in this period |
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What is fetal period? |
It begins from week 9 after fertilization, it is the period when fetus growth and weight gain occur. |
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What is gametogensis? |
It is formation and maturation of functioning gamets |
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What does seminal fluid contain? |
3:5 cc each 1 cc contains 100 million sperms (if 1 cc has 20 million sperms it stills fertile) & glands secretions ( alkaline fluid which contains calcium and vitamin C) |
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What is meaning of "oligospermia" |
When someone has few sperms. |
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What is meaning of "ozoospermia" and"necrospermia"? |
Ozoospermia means absence of sperms Nercrospermia means dead sperms |
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Is all spermatogonia converted into primary spermatocyte? |
No, the two daughter cell of spermatogonia , one of them is reversed. |
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Whan does oogensis start? |
When a female empryo has 3 hours till and it stopes at birth(prenatal menstruation) it starts again at puberty (postnatal masturation) |
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What's happen at perinatal mensturation? |
Profilration , growth and the start of meiosis 1 |
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What's happen at postnatal mensturation? |
The meiosis 1 is fulfilled which occur shortly befor ovulation, meiosis 2 is fullfiled when sperm penetrate oocyte |
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Where does fertilization occur? |
The last third of fallopian tupe |
