* Muscle Types
* Muscluar System
* Muscle-Bone Interactons
* Tendons and Ligaments* Major Skeletal muscles
Cardiac muscles are involuntary and found only in the heart. They are controlled by the lower section of the brain called the medulla oblungata, which controllsinvoluntary action throughout your body. Think about how horrible it would be to have to consciously tell your heart to beat, with the consequence of forgetting being death. What about when you went to sleep!?! But luckily enough, the medulla oblungata does all that for us.
Your heart cells come in long strips, each containing a single nucleus, one of the key factors in determining which of thethree classes any particular muscle is. Located at the walls of the heart, its main function is to propel blood into circulation. Contraction of the cardiac tissue is caused by an impuse sent from the medulla oblungata to the SA nerve located at the right atrium (link-circulatory) .
<<picture of cardiovalscular muscles>>
Your smooth muscles, like your cardiovascular muscles,are involuntary. They make up your internal organs, such as your stomach-hyper link, throat-hyper link, small intestine-hyper link, and all the others, except your heart.
Unlike cardiovascular muscles, smooth muscles are generally spherical, as most other human cells are, and each contains one nucleus.
<<diagram of smooth muscles>>
The skeletal muscles are the onlyvoluntary muscles of your body, and make up what we call the muscular system. They are all the muscles that move you bones and show external movement.
Unlike either of the other two classes, skeletal muscles contain multiple nuclei because of its large size, being in strips up to a couple of feet long.
<<diagam of skeletal muscles>>
The muscles we have in our bodyare divided into three classes of muscles: cardiac, smooth, and skeletal. Usually, when we think of muscular system we often only remember the skeletal muscles because they make up what is recognized as the muscular system. The muscular system, composed of over 600 muscles, come in a variety of shapes and forms. Diffrences between each muscle are recognized by location, function, structure, and theway they are contracted.
Muscle-Bone interactions LEVER SYSTEM
A lever is a rigid bar on which a given load is moved with supporting help from a fulcrum. A fulcrum is a fixedpoint on which lever can move in diffrent ways or angles. The whole muscular system interacts in this kind of way with the skeletal system-hyperlink. Given a load the muscles pull the bone up or in any direction againsrtthe load. Your joints-hyperlink usualy seem to be the fulcrum on which you move the lever or bone. For example, try lifting a book with your hand and puting your elbow on the table. You can move the book in any direction with the help of the joints in your elbow, and the book is lifted in any direction due to the muscles contractions.
Skeletal muscles can be broken down into groups based upon...