Skeletal+and+Muscular+System-+Period+2

 The ribs and sternum are helpful bones that protect your heart and lungs...sometimes. The sternum (or breastbone) covers some of the heart and the ribs, protect the lungs like a cage to keep them safe. Even though it protects the heart and lungs, it doesn't protects the organs below. Why is this? It is probably a trade of protection for flexibility. If humans had ribs all the way down to the hip-bone, they wouldn't be able to bend too much. The arrow most likely shot through the ribs and pierced a lung. Just like up above we told you the arrow that shot Robin could of gone right between his rib cage and puncture a lung it also could have gone in between the rib cage or possibly at right angle it could have gone right underneath the rib cage and hit the diaphragm which could make it harder to breath or in possible hours make him stop breathing and die. Bursae are fluid filled joints with injoints. osteocytes are the living bone cells. compact bone is the layer of the hard bone and spongy bone is the compact bone that surrounds less dense bone. Smooth Muscle- You can not control these muscles, you brain and body tells the muscles what to do without you thinking about it. They are in your stomach and digestive system and relax to allow food to go through the body. Cardiac Muscle: Type of involuntary muscle that makes up your heart. Cardiac muscle fibers are interconnected and form a network that helps the heart muscle contract efficiently. Only found in the heart
 * //Matthew Asterito, Cole Weber, Malcolm Young, Julia Sliwinski.media type="youtube" key="pbTah5NVOtU" height="344" width="425"This video shows what voluntary, facial, chest, lower/upper back, abdominals, and arm and leg muscles do for the body.//**

We beleive that Robin may have injured his diaphragm, abdominals, and his colon considering that they are all linked to openings in his body.

Here are some interesting facts about the the muscle and skeletal systems. ** the ribs help protect the heart, lungs and every organ behind the lungs but the colon is vulnerable of getting damaged **
 * the throat is the only jointless bone
 * it takes 72 muscles to produce speech
 * there are 206 bones in the body
 * the body has 91 body landmarks such as tendons, arterires, veins, nerves, and more.