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19 Cards in this Set
- Front
- Back
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What are the three embryonic germ layers? |
Endoderm, Mesoderm, and Ectoderm |
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What structures are derived from the endoderm? |
digestive system, lungs, endocrine system |
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What structures are derived from the mesoderm? |
muscle, skeleton, cardiovascular, reproductive system |
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What structures are derived from the ectoderm? |
nervous system, skin, and hair |
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What is sexual differentiation? |
the initial step in sex determination |
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Which determines sex, the sperm or the egg? |
sperm |
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What is chryptorchidism? |
when the testicles do not descend |
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Chryptorchidism can be either _____ or ______. |
Lateral or bi-lateral |
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What is an inguinal hernia? |
When the abdominal contents pass through the inguinal ring and enter the vaginal cavity causing a build-up of blood and ingesta and blood and sometimes killing the tissue |
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What is a zygote? |
a single cell |
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What is a polar body? |
left over genetic material |
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what is cleavage? |
cell division without an increase in cell mass |
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what is the normal course of embryonic development? |
doubling number of cells, miotic divisions |
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What makes mares different than other species in terms of the transport of unfertilized eggs? |
They do not transport unfertilized eggs to the uterus |
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What are the two lobes involved in the development of the pituitary gland? |
The anterior lobe and the posterior lobe |
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Where does the anterior lobe come from? |
The roof of the mouth |
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Where does the posterior lobe come from? |
the brain |
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What tissue makes up the anterior lobe? |
glandular tissue |
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What tissue makes up the posterior lobe? |
neuro tissue |
