Name: Gross Features  
Definition: The external appearence of animals usually gives clues to the identity of their group, and sometimes, to their environment.
Structure: Vertebrates have body regions and locations shared by all members of this subphylum. The head, vertebral column, and the rib cage make up the axial skeleton. The pectoral and pelvic girdles, with the upper and lower extremities, make up the appendicular skeleton. These external parts make up the somatic part of the body, and the internal organs make up the viscera.The integumentary (skin) system covering the internal structures reflects by its' shape, the underlying structures. Vertebrates with four feet are called tetrapods.

Function: Vertebrates are easily able to move about in their environments because of the flexible appendicular skeleton which supports the more rigid axial skeleton. It contains specialized organ systems, the viscera, protecting them from injury.


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