Figure 1: This is a catshark pectoral fin and a mouse forelimb. (a) Skeletal pattern. In a catshark fin, three basal bones are connected to the pectoral girdle, whereas in a mouse limb, a single basal ...

Your body is comprised of joints, muscles, and structures that connect one bone to the next. A pectoral girdle, also referred to as the shoulder girdle, connects your upper limbs to the bones along ...

Check out a week full of exciting shark programming on Nat Geo Wild's SharkFest, starting July 23. Sharks don't have tongues to help them swallow food, so instead, some shrug their shoulders to keep ...