Skeleton muscle notes

Skeleton muscle notes - The Skeleton Three main functions...

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The Skeleton Three main functions  1. Support 2. Protection 3. Movement Three main types  1. Hydrostatic skeleton Consists of fluid held under pressure in a closed body compartment cnidarians, flatworms, nematodes, and annelids Annelids use their hydrostatic skeleton for peristalsis Peristalsis:  A type of movement on land produced by rhythmic waves of muscle  contractions (annelids) 2.  exoskeleton A hard encasement deposited on the surface of an animal mollusks and arthropods 3. endoskeleton  consists of hard supporting elements Such as bones, buried within the soft tissue of an animal sponges, echinoderms, and chordates Types of joints (where two or more bones meet is called a joint.)  Sutures (Skull)   do not have a wide range of movement, allow for growth and very limited  flexibility.  Hinge joints   (elbow and knee) allow for movement in one plane, bend up and down.  Gliding joint  (wrist and the foot), Two flat-surfaced bones that slide over one another, provide for limited  movement.  Ball-and-socket joints (shoulder and hip) allow for the greatest range of motion, can rotate in a complete circle. Types of Arthritis Osteoarthritis:  Wearing down of cartilage Rheumatoid:  Inflammation of joints due to immune response towards self Osteoporosis:   "porous bones." It occurs when bones lose an excessive amount of their protein and  mineral content, particularly calcium. Over time, bone mass, and therefore bone strength, is decreased. Tendon: a fibrous connective tissue which attaches muscle to bone (or structures like the eyeball) to 
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This note was uploaded on 03/28/2011 for the course BILD 1 taught by Professor Chen during the Winter '11 term at UC Riverside.

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Skeleton muscle notes - The Skeleton Three main functions...

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