1. Gather information from secondary sources (including photos/diagrams/models) to observe, analyse and compare the structure of vertebrate forelimbs.
Comparative anatomy is the study of the differences and similarities in structure between different organisms. An example of comparative anatomy is the pentadactyl limb which is the basic five-digit bone structure of many vertebrate's forelimbs. The vertebrate forelimb (or the pentadactyl limb) comprises of the humerus (upper arm), radius and ulna (forearm), carpals (wrist), metacarpals (palm of hand), and phalanges (fingers).
The pentadactyl limb is evidence that present-day vertebrates (which include fish, birds, amphibians, reptiles and mammals) are closely related. It is believed they inherited this structure from an ancient aquatic ancestor, the lobe-finned fish. Due to natural selection, all vertebrate forelimbs, although have the same structure, are......
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