Animal Body Systems

3. Purpose of this task is to remove wastes from cellular metabolism
4. Many soft bodied invertebrates have a _________ skeleton made of water like a fluid filled balloon.
8. Purpose of this task is to transport oxygen and nutrients to the other parts of the body.
10. Type of fertilization that occurs outside the body and common in aquatic animals
14. Body Systems are __________ to carry out different tasks
15. Type of reproduction that does not involve fusion of two gametes
16. In simple animals, gases are exchanged directly with their environment through _________.
17. This system provides a framework that supports an animal's body.
18. Complex animals, like dogs, have an ____________: hard material such as bone embedded within the animal.

1. Purpose of this task is to obtain energy and nutrients from food
2. Two types of circulatory systems in animals are _______ and _______. (name both)
5. Purpose of this task is to exchange oxygen and carbon dioxide gases
6. Complex animals have a ____________ to coordinate the activities in their body and allow them to sense and respond in an environment.
7. Some invertebrates, such as a insects and crabs, have an __________: a rigid external skeleton.
9. Type of fertilization that occurs inside the body and common with land animals.
11. More complex animals have specialized respiratory structures like ______ or ________. (name both)
12. Purpose of this task is to produce offspring to ensure that the species survives
13. Type of reproduction formed by the union of a male and female gamete.