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20 Cards in this Set
- Front
- Back
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What are some soft anatomy characteristics of mammals? (6)
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1. Glands (mammary)
2. Sebaceous Glands (oil secrectio=water proofing, moisture, sweat, etc) 3. Hair 4. Anucleate Erythrocytes 5. Lungs; muscular diaphram 6. Endothermic: maintaines a constant body temp-allowing for more activity 7. Four-chambered Heart |
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Compare the lungs of mammals to birds, ie which is more "advanced"?
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Birds are more advanced because tr "air way" is unidirectional, while mammals is bi-directional and thus the new, incoming O2 is mixed w/the CO2 tt's left behind in the lungs at all times
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What other soft anatomy (not lungs) do birds share w/mammals?
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4-Chambered Heart
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What are some hard anatomy characteristics of mammals? (4)
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1. Lower Jaw; comprised of a single bone, the dentary
2. Jaw articulation; Dentary-Squamosal articulation 3. 3 earossicles (3 bones in the ear) 4. Bones |
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What is the Dentary-Squamosal Articulation?
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The junction where the lower dentary bone meets w/the upper squamosal bone
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What are the 3 earossicles in mammals?
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1. Malleus
2. Incus 3. Stapes |
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What are the 3 componants of Hair? Describe each
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1. Cuticle: scale-like pattern of cells
2. Cortex: highly packed middle layer containing pigment 3. Medulla: central core of cuboidal cells |
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What are the 3 types of hair?
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1. Vibrissae
2. Guard Hairs 3. Underhairs |
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What are Vibrissae hairs?
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Long stiff hairs w/well innervated bases tt primarily serve as tactile receptors
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What are the three types of Guard Hairs?
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Spines, Bristles, Awns
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What are Guard Hairs?
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Overhairs that are the most conspicuous on most mammals and serve mainly as protection
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What are Spine Guard Hairs?
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Greatly enlarged, stiff guard hairs w/definitive growth (porcupine quills)
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What are Bristle Guard Hairs?
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Long firm hairs w/angora growth (continuous). (horse and lion manes
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What are Awn Guard Hairs?
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Hairs w/definitive growth tt hv a firm expanded distal portion and a smaller weaker base. Most noticeable hairs on most mammals
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What do underhairs do?
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Primarily for insulation
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What are the three types of underhairs?
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Wool, Fur, Velli
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What is Wool, Fur, and Velli?
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Wool=angora underhair
Fur is fine, relatively short hair w/dfinitive growth all over body. Vellie= down or fuzz |
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Mammals have which aortic arch? Reptiles? Birds?
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mammals = left aortic arch
birds= right reptiles = both |
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What part of the forebrain is greatly enlarged in mammals?
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neopallium, or roof of the forebrain is proportionately larger in mammals than in other vertebrates
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What elaboration of the midbrain is found only in mammals?
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The corpora quadrigemine
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