Compare the skeletal structure of each limb to the human arm. Relate the differences you see in form to the
differences in function.
Animal
Whale
Cat
Comparison to Human Arm in Form
Whate has a much shorter and thicker humerus.
radius, and ulna. Much longer metacarpals.
Thumb has been shortened to a stub.
Comparison to Human Arm in Function
The whale fin needs to be longer to help in
movement through water. Thumbs are not
necessary as the fins are not used for grasping
Bat
Bird
Crocodile