Animal Structure

5. intestine: A digestive structure that mixes digestive juices with food and absorbs useful parts of the food.
6. A place where two or more bones come together.
9. A female reproductive structure.
11. Blood vessels that carry blood away from the heart.
14. A type of skeleton on the outside of some animals’ bodies. It is a hard cover. Many invertebrates, like insects, have exoskeletons.
16. Balloon-like structures in the bodies of some animals that take in air and release waste. (This one is a bit of a stretch, but in some animals like frogs, the lungs participate in digestion as well.)
17. A material consisting of solid parts floating in liquid plasma, which moves substances through an animal’s body.
19. A lightweight, flat structure that forms an outside covering of a bird’s body.
20. A flattened stiff plate that forms an outer covering on a fish or reptile.

1. The process of moving blood and the materials it carries through an animal’s body.
2. A flattened structure on the body of a fish that helps the fish move, steer, and balance.
3. intestine: A digestive structure that removes water from undigested food.
4. A hard structure that is part of an animal’s internal skeleton.
7. A pump made of muscle that moves blood through the body.
8. The process that breaks down food into smaller substances that the body can use.
10. A male reproductive structure.
12. A digestive structure lined with muscles that stir the food and mix it with digestive juices.
13. A structure that contracts and relaxes to produce movement.
15. All of the bones or other structures that provide support to an animal’s body.
18. Blood vessels that carry blood back toward the heart.