Animal Studies a Text book of Elementary Zoology for Use in High Schools And Co
Animal Studies a Text book of Elementary Zoology for Use in High Schools And Co
Jordan David Starr
The book Animal Studies a Text book of Elementary Zoology for Use in High Schools And Co was written by author Jordan David Starr Here you can read free online of Animal Studies a Text book of Elementary Zoology for Use in High Schools And Co book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Animal Studies a Text book of Elementary Zoology for Use in High Schools And Co a good or bad book?
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According to the nature of the food, the beak may have a great variety of forms. The skull may be thick and heavy, or thin and fragile, but these are mat- ters of proportion of the various parts possessed by all birds. The neck also is of differing length ; but it is in the trunk region that the greatest changes have arisen, as we may see in any of our ordinary birds. For example, the vertebrae of this part of the body are more or less fused together into rigid framework, to which are attached ...the ribs that in turn unite with the breast-bone. In the fliers the latter bears a vertical plate or keel, to which the great muscles that move the wings are attached. The tail con- sists, like that of the old-fashioned birds, of several verte- bras, but these are of small size and fused together into a little knob that supports the tail-feathers. The fore limbs are used for flight, but there are the same bones that exist in the fore limbs of other vertebrates one for the upper arm, two for the lower, a thumb carrying a few feathers, and known as the bastard wing, and indications of several bones that form the hand.
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