1. In terms of the differences between the opossum, bird, bat, and mole skeletons which you examined, which is most like the human (and therefore, most primitive or generalized) ? the diet
1. In terms of the differences between the opossum, bird, bat, and mole skeletons which you examined, which is most like the human (and therefore, most primitive or generalized) ? the diet
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:1. In terms of the differences between the opossum, bird, bat, and mole skeletons which you
examined, which is most like the human (and therefore, most primitive or generalized) ?
2. Which is least like the human and, therefore, the most specialized ?
3. Most anatomists consider bats more specialized than moles; but what important differences
can you see between the mole's forelimbs and that of humans? Why is the front limb of the
mole so specialized? Can you identify: the humerus, clavicle, and scapula in the mole?
4. Compare the bat to the bird. Identify the humerus in each. Where is the bat's ulna? Are
there any remnants of it? How is the bat's wing membrane supported by its skeleton? Be
precise. (You may wish to examine a preserved bat on the display table.) Does a bird's wing
work in the same way? Examine the feathered bird's wing on the display table. What has
happened to the bird's hand? How many metacarpals and digits ("fingers") does it have?
You may need help from the labeled bird's skeleton on page 8-8. Draw a diagram of the
separate skeletal elements in a bird's wing and a bat's wing, labeling each major bone
humerus, ulna, carpals (wrist bones), metacarpals, phalanges, or digit bones. (This has
been an example of two structures which are skeletally homologous and analogous as
well.)
Please disregard instruction about drawing a diagram of sceletal elements!!
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