Muscular System
In the muscular system, muscles contract by puling on bones to cause movement. It helps us move around and function correctly. Without the muscular system, we would not be able to lift things or move around or do anything. This is how the muscular system helps us maintain homeostasis, by helping us move and function correctly. Otherwise, we wouldn't be able to get the exercise our bodies need to thrive. It involves muscular tissue, connective tissue, and nervous tissue. As an example it uses nervous tissue to have your brain tell your muscles to move. Pretty neat! Muscles are attached to bones by tendons. Muscles and ones need to work together. See the skeletal system. Our muscle system is a very important part in moving and functioning.
"The painter who is familiar with the nature of the sinews, muscles, and tendons, will know very well, in giving movement to a limb, how many and which sinews cause it; and which muscle, by swelling, causes the contraction of that sinew; and which sinews, expanded into the thinnest cartilage, surround and support the said muscle."~ Leonardo Da Vinci Image one: This shows Muscular Dystrophy, it is showing the weakening of the muscle.
Image two: This is an image of myasthenia gravis On the left, it is showing the membrane damage, this causes facial features such as your eyes to droop. on the right, it shows your acetylocholine receptors decreasing, causing acetylocholine to leak through and make your facial features droop. Image three: this is a rotator cuff tear. It is showing the ball and socket joint (where the arm and shoulders meet), get torn from twisting or rotating it too hard. "Myasthenia gravis is not 'all in our heads.' It is in our neuromuscular junctions."~ Unknown |
In this video, you will learn about the connection between bones and muscles. It also goes over their function and movement.
Diseases:Muscular Dystrophy – A group of inherited diseases in which the muscles that control movement progressively weaken. The most common form in children is called Duchenne muscular dystrophy and affects only males. It usually appears between the ages of 2 to 6 and the afflicted live typically into late teens to early 20s.
Myasthenia Gravis – This is an autoimmune disease that involves production of antibodies that interfere with nerves stimulating muscle contractions. Face and neck muscles are the most affected. There is no paralysis of muscles involved, but a rapid fatiguing of function. Rotator Cuff Tear – Muscles surrounding the shoulder joint are involved in rotating the shoulder with upper arm and hand forward and backward, among other movements. The tendons of these muscles also contribute to the structural strength of the shoulder joint. Hard, fast movements, can tear one of these tendons resulting in pain and decreased mobility of the shoulder. |