Across
- 2. Mammals are _____-blooded.
- 4. Inner skeletons are made of _____.
- 5. Mammals produce _____ for feeding.
- 6. Their babies are delivered live instead of in eggs
- 7. _____ are used for respiration.
Down
- 1. Hair and fur offer mammals _____.
- 3. Their hearts are divided into four _____.
- 7. Movement is accomplished by using four of these.