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COMPARING A HUMAN AND AVIAN SKELETON

The avian (bird) skeleton has many features that resemble the human skeleton, and the majority of the bones are the same, they are only shaped different. When structures are similar in different organisms, they are called homologous. The main difference between the human and bird skeleton is that the bird's skeleton is adapted for flight. For instance, the bones of a bird are hollow which makes the skeleton lighter. The collarbone of the bird is fused for stability and is called the .... (full text abbreviated).

Questions

1. Define homologous. When structures are similar in different organisms

2. Name two ways in which the bird's skeleton is adapted for flight. hollow bones, fused bones

3. What bone is the drumstick? _tibia_____
What bone is the wishbone? __furculum____

4. What two bones make up the bird's beak? maxilla and mandible

5. What bones make up the bird's forelimb? humerus, radius, ulna

6. What bones make up the bird's hindlimb? tibia, femur

7. What bone in the bird is homologous to the human's collarbone? furculum

8. The tailfeathers attach to what bone? pygostyle

9. List two bones you will find in a bird, but not in a human. furculum, pygostyle, keel

10. List two bones you will find in a human, but not in a bird. patella, fibula