BIOL 1902 Lecture Notes - Lecture 5: Pectin, Hemicellulose, Astringent
26 Feb 2016
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Snake"s tongue is forked b/c each fork picks up scent molecules in air: when pulls tongue back into mouth, roof of mouth has 2 chambers, each fork goes into 1 chamber (like chemistry labs, excellent olfactory sense, adaptations: Long snout longer the snout, more air. Enlarged snout houses more sensory cells & jacobson"s organ (aka vomeronasal organ) Larger animals can stick out tongue to lick air for scent molecules (e. g. , moose, deer) When animal curls back lip & opens mouth, exposes inner part of mouth to air & possible: moose & other mammals expose jacobson"s organ by flemen (e. g. , moose, fox) air chemicals. Eye placement = side of face (e. g. , mallard) Beaver"s eyes float in water with only top part of head showing. Eye placement affected by other aspects of animal"s natural history. Can smell, see, & hear at the same time (aligned) Beaver has all of its sensory organs near top of its head: e. g.
