1. By Marlena B

2. Running Pictures

3. Running  Running is an activity where one runs. You can either do short, fast runs or run for a while.

4. Skeleton Description:What’s Used:  Your skeleton is the frame of your body, helping you move. Also, bones have marrow, which helps replenish blood cells that give oxygen to your body allowing it to move. Also, bones meet at joints which bend as you move.  Your body uses lots of bones to run. This includes bones in your legs, like the tibia, fibula and femur, and bones in your arms like the ulna, radius and humerus.

5. Muscular Description:What’s Used:  Muscles are what help your body move. They flex and relax as you do so. When you run, you use lots of muscles to help you move.  Skeletal muscles: Skeletal muscles are muscles than you use voluntarily. These help you move your arms, legs, abdomen and such when running  Smooth muscles: Smooth muscles are involuntary muscles that move things like you stomach and intestines. These help you digest food, which you turn into energy for running.  Cardiac muscles: These muscles are the muscles of your heart. Your heart gives blood to your body, helping it do things like move.

6. Digestive Description:What’s Used:  Your digestive system digests food and turns it into energy. You can use the energy to run.  There are different parts of the digestive system. First you chew the food in your mouth, then it goes through your esophagus and then to your stomach. Then it goes through your small intestine where lots of nutrients is absorbed. Then it goes through the large intestine.

7. Immune Description:What’s Used:  Your immune system helps keep germs and viruses out. It helps keep you from getting sick. When your sick, you are using energy to keep out the virus. This means that when you’re sick, you have less energy for running.   Your immune system has defenses. White blood cells help fight viruses, found in lymph nodes. The spleen filters blood cells. The appendix and thymus both help as well.

8. Circulatory Description:What’s Used:  The circulatory system includes veins, arteries and your heart. Oxygen keeps cells in your body alive, helping it move and therefore run.  Your arteries give blood to parts of your body, veins get blood that doesn’t have as much oxygen back to your heart, and your heart is what is taking it and giving out blood.

9. Nervous Description:What’s Used:  Your nervous system tells your body what to do. Your brain sends messages to your body, or your body sends messages to your brain. Your brain can tell your legs and arms to move in a running movement and they will do so.  Your brain is where the messages are received or sent from and where you think. Messages go through your spinal cord and your nerves.

10. Respiratory Description:What’s Used:  Your respiratory system gets oxygen and helps put it in your blood cells. The oxygen is taken to parts of your body. The oxygen keeps cells in your body alive, therefore allowing you to move and run.  Oxygen goes through your trachea and into your lungs. Your diaphram contracts when you breath in and relaxes when you breath out. Your lungs have bronchiole that take in the oxygen and put it in your blood cells.