The Immune System (Your Body: How It Works)
The Immune System (Your Body: How It Works) by Gregory Stewart
English | pages: 134 | 2003 | ISBN: 079107630X | PDF | 10,3 mb
English | pages: 134 | 2003 | ISBN: 079107630X | PDF | 10,3 mb
Many of the other systems of the human body are probably somewhat familiar to you. The skeletal system includes the bones of the body and serves as a support system for the rest of the body systems. The muscular system allows the body to move, and the digestive system allows us to take in food and convert it to forms needed to build and maintain the body. It is relatively easy to understand the functions and the importance of these systems, but what about the immune system? The immune system is extremely important to us.