Animals: multicelled life

1. The Units of Life

Animals Cells

Working Together

Organs and Organ Systems

2. On the Outside

3. Movement and Support

Skeletons

4. Nerve Cells

The Nervous System

The Senses

5. Chemical Messengers

6. Regulation and Control

Waste Management

7. Feeding and Digestion

The Digestive Tract

8. Circulation and Respiration

Breathing

9. Fighting Infection

10. Reproduction

Development

The Animal Kingdom

Glossary

Further Reading and Websites

Index

1. Different cells for different jobs: tissues, organs and organ systems

2. On the outside

3. Muscle and bone: skeletons

4. Keeping in touch: nerve cells, nervous systems, senses

5. Chemical messengers: sex and stress

6. Regulation and control: waste management

7. Feeding and digestion: the digestive tract

8. Circulation and respiration: gaseous exchange systems

9. Fighting infection

10. Reproduction: the next generation, fertilization.