1. The Human Body Systems

2. The Human Body Systems
The human body is like a complex organization that has an important job to get done. In order to get everything done perfectly and on time, it has to use a system. Actually, the human body uses many systems that work side by side.
by Bobby

3. The Body Systems Work Together
The heart is like the president of the organization.
Some of the body's systems are directly connected to the heart, while others are not.
Even if the heart is not directly involved in the system, it still plays a part.
If the heart isn't working, nothing else is working either.
The heart actively participates in the circulatory system, while it just keeps an eye on the respiratory and excretory systems.

4. The Body Systems The Digestive System The Skeletal System
The Circulatory System
The Muscular System
The Nervous System
The Respiratory System

5. The Circulatory System
The main parts of the Circulatory System are: the heart, veins, arteries, and capillaries.

6. The Circulatory System
The circulatory system performs many vital functions. Your heart pumps blood and nutrients to tissues all over the body using veins, arteries, and capillaries. The circulatory system is also important in the removal of wastes and in several other body processes.

7. The Main Organ of the Circulatory System
The main organ of the Circulatory system is the heart.
The heart's primary function is to pump blood to all parts of the body, bringing nutrients and oxygen to the tissues and removing waste products.

9. Nervous System
The main parts of the Nervous System are the Brain, the Nerves, and the Spinal Cord.

11. The Brain
The brain is much more complex than the spinal cord.  It has many divisions within it. 
The brain stem controls most of the life systems commands such as breathing and heartbeat. 
The cerebellum controls balance and the coordination of muscles to move.
The cerebral cortex is the most advanced part of the brain.  This is where conscious thought takes place.

12. The Spinal Cord
The spinal cord is a long bundle of white nerve matter that is found in the middle of the spinal column.  It is a link between the brain and the body. 

13. Respiratory System
The main parts of the Respiratory System are: the lungs, diaphragm, nose, trachea, and larynx

14. Function of the Respiratory System
The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respiratory system does this through breathing. When we breathe, we inhale oxygen and exhale carbon dioxide. This exchange of gases is how the respiratory system gets oxygen to the blood.

15. The Respiratory System
Air is breathed in through the nasal cavity and/or mouth and down through the throat (the pharynx). The air passes down the trachea (the windpipe), through the left and right bronchi, and into the lungs. Oxygen in the blood is delivered to body cells.