Fact Sheet for Human Body Systems
Directions: Print out this sheet and fill in the missing facts about the four human
body systems you will be studying. Use the links to human body web sites to
help you complete the fact sheet.
 Nervous System
1. The nervous system is divided into two main systems, the ________and the
_________.
2. The _________and the _________make up the Central Nervous System
 Digestive System
3. The human body needs fuel to live. Food must be broken down into
chemicals that the body can use. This process is called_____________.
4. List the parts of the body that are involved in digestion.
5. In the stomach the food is mixed with ______________.
6. About how long is the small intestine? _______________.
7. The lining of the small intestine is made up of millions of fingers
called_______________. These “fingers” absorb the chemicals that the body
needs from the food we eat.
8. Waste products and food that are not absorbed in the small intestine pass into
the ________________.
9. It may take as long as _______hours for food to pass completely through the
large intestine.
 Respiratory System
10. What are the body parts that make up the respiratory system? List them
here:
11. All animals need oxygen to live. Land animals get oxygen from the
_______.
12. The lungs are protected by our ________.
13. The lungs are the pickup place for ________and the drop off place
for_________.
14. The lungs are always working, breathing in _____and breathing out
carbon dioxide.
 Circulatory System
15. Blood is pumped into the ______from the ________through the
pulmonary arteries. Blood with oxygen leaves the lungs through the pulmonary
veins and travels to the heart. Oxygen is the fuel
that makes all the body processes run.
16. The circulatory system is made up of the vessells and the muscles that
help and control the flow of the blood around the body. This process is called
__________.
17. The main parts of the system are the _____ , _______, ________,and
_______.
18. As blood begins to circulate, it leaves the heart from the left ventricle and
goes into the______.
19. The __________is the largest artery in the body.
20. The blood leaving the aorta is full of _______.This is important for the
cells in the brain and the body to do their work.
21. On its way back to the heart, the blood travels through a system of veins. As
it reaches the lungs, the _______(a waste product) is removed from the blood
and replaced with fresh ______that we have inhaled through the lungs.
22. Did you know that your heart is the strongest muscle?
Your heart is divided into _____sides.
The right side pumps ______to your lungs where it picks up oxygen.
The left side pumps
oxygen-soaked blood out to your body. They do
not work on their own, but together as a team.
The body's blood is circulated through the heart
more than 1,000 times per day. Between five and
six thousand quarts of blood are pumped each
day. Your heart is about the same size as your fist.