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26 Cards in this Set
- Front
- Back
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Describe the teeth structure in rats? |
Incisors grow and lack enamel an posterior surfaces, so rapid wear of this forms chisel shape. |
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What organ is absent in rats? |
Gall bladder |
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In rats, what is the structure anterior to the scrotum? Difference in rats vs primates? |
The prepuce (skin fold concealing glans of the penis). In rats the flaccid penis is contained within the abdominal wall, whereas in primates, penis is external to the body wall. |
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What is the esophagus position in comparison to the trachea? |
esophagus is ON TOP of trachea, so is dorsal NOT anterior (meaning front). |
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What is the structure that separates the thoracic and abdominal cavity? |
Diaphragm. |
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What are the different regions of the peritoneum? What does it surround? |
Has an outer layer (parietal peritoneum) A continuous layer that suspends the intestines (mesentry) And a layer that surrounds the intestine (visceral peritoneum. It surrounds the peritoneal cavity. |
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What does the mesentery contain? |
Fat and blood vessals. |
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What are the 3 different vantral body cavities? |
Peritoneal cavity Pericardial cavity Pleural cavity (lungs, 2 of these, 1 right and 1 left) |
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The base of the heart is surrounded by what gland? |
Thymus gland |
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There are two regions of the stomach, what are they and their functions? |
The transparent region (storage) and the opaque region (digestion) |
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What is the pyloric sphincter? |
A constriction in the stomach controlling flow ( of chyme) into duodenum. |
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What are the three regions of the small intestine, and their functions? |
Dudenum - digestion Jejenum - absorption Iliem - absorption |
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What is the function of double layer peritoneum (mesentry) around the small intestine? |
It supplies (arteries) and drains (veins) intestinal wall. Vein takes this nutrient rich blood to liver through hepatic portal vein. |
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Where is the pancreas located? |
close to the greater curvature of the stomach. |
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What is the largest gland in the body? What does it do? Describe what it looks like, and what this means? |
Liver Make bile Liver is dark red, meaning highly vascular. |
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What does the gall bladder do |
Store bile and secretes to duodenum. Rats dont have this, so bile goes from liver directly to the duodenum. |
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What colour is the spleen? what does this mean? |
Dark red Highly vascular. |
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Is the appendix part of the large intestine? |
no |
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What are the regions of the large intestine? |
1. caecum 2. colon 3. rectum 4. anus |
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What happens in the caecum? |
Bacteria here breaks down gut contents. |
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The anus has 2 sphincters, what are they? Are they voluntary? |
Inner (involuntary) and outer (voluntary) |
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Kidneys are said to be retroperitoneal, meaning.. |
behind the peritoneum |
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What colour are kidneys? |
dark red, highly vascular |
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What is the glottis and epiglottis? |
Glottis is the opening between oesophagus and trachea, the epiglottis is what blocks the pathway. |
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Where is the hard palate and soft palate? |
Hard palate towards anterior roof of mouth. Soft palate in posterior roof. |
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What are two salivary glands of the mouse? |
Parotid gland and sublingual glands. |
