The document discusses the major systems of the human body, including the circulatory, digestive, respiratory, nervous, and skeletal systems. The circulatory system transports blood through the heart, arteries, and veins. The digestive system breaks down food through the mouth, esophagus, stomach, and intestines. The respiratory system provides oxygen to the body through breathing. The nervous system controls all body functions using the brain, spinal cord, and nerves. The skeletal system is composed of bones and connecting tissues like tendons and ligaments.

1. The Human Body

2. Did you know that…?
• Humans use more than 200 different
muscles to walk.
• Babies have about 300 bones at birth…
many fuse together during the process of
growing up.

3. Systems of the Body…

4. The Circulatory System

5. The Circulatory System
• Transport system
• The heart = MAJOR ORGAN OF THIS
SYSTEM.
• Arteries carry blood away from the heart.
• Veins carry blood to the heart.

6. The Digestive System

7. The Digestive System
• Food = gas
• Mouth = where you add
gas
• Esophagus = gas pump
• Stomach = gas tank
• Intestines = engine

8. The Respiratory System

10. The Respiratory System

11. The Nervous System

12. The Nervous System
• The information system that controls
everything you do.
• Composed of brain, spinal cord, and
nerves.

13. Skeletal System
• Composed of bones
and the tissues that
connect them
(tendons, ligaments,
and cartilage).

14. Skeletal System
• Did you know that...?
• Hands and feet contain
over half of the body’s
bones.