BIOL 1902 Lecture Notes - Lecture 9: Cecum, Bohemian Waxwing, Coprophagia
11 Oct 2017
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Serpentine miner) - little miners that create patterns inside the leaf: modi ed teeth - incisors are used to break down the tough plant material, they never stop growing and they self sharpen (i. e. beavers). Because of the iron that it contains: moose (and deer) only have lower incisors so they rip o plant tissues - large cheek teeth grind up the food. Muscles are what drives the teeth, masseter"s power the back teeth and thus allows plant material to be broken down. Herbivores tends to have very large masseter"s: mandibles, radula, and cheek teeth all physically break down plant material: they perform the same function but arise from di erent origins - Analogous structures: spruce grouse eat spruce needles - they have no teeth to break the material down so they use gizzards (huge muscular organ, it"s like a cheese grater. The muscles start to contract, expand and twist as it grinds up the food.
