Skeletal System

The Skeletal System : 

The Skeletal System Luke Williams

Skeletal System Main Functions: 

Skeletal System Main Functions Provide internal support Protection for delicate organs. Allow for muscle attachment Produce blood cells The skeleton is made up of 206 bones in adulthood. It gives us the shape we have, and the power to move. The skeleton is divided into two groups: the axial skeleton and the appendicular skeleton.

Major Organs : 

Major Organs Bones Cartilage T endons Ligaments

Slide 4: 

Bones Bones are a major organ of the skeletal system. Their purpose is to protect and support the function of other organs in the body. Bones store minerals and provide blood protection while producing red and white blood cells.

The Clavicle: 

The Clavicle The clavical forms the anterior portion of the shoulder girdle. It is a long and curved bone, and is placed nearly horizontally at the upper and anterior part of the thorax above the first rib.

Inside the Bone: 

Inside the Bone The inside of the bone is made of three primal tissue layers: Periosteum Compact bone S pongy bone

Compact Bone: 

Compact Bone Compact bone seems very hard when seen by the normal eye, but at a microscopic level, the compact bone is very hollow. Canals called canaliculi , which are filled with blood vessels, channel through the bone and all join to many major canals called Haversian canals. These canals make the bone hollow. The compact bone is also rich with nerves. The hardness of the bone is made by spider like osteocytes , mature bone cells, which surround the caniculli and Heversian canals.

Compact Bone: 

Compact Bone

Osteocytes: 

O steocytes Osteocytes, star-shaped cells, are the most abundant cell found in compact bone. Cells contain a nucleus and a thin ring of cytoplasm. When osteoblasts become trapped in the matrix they secrete, they become osteocytes. Osteocytes are networked to each other via long cytoplasmic extensions that occupy tiny canals called canaliculi , which are used for exchange of nutrients and waste through gap junctions. The space that an osteocyte occupies is called a lacuna. They destroy bone through a rapid, transient (relative to osteoclasts) mechanism called osteocytic osteolysis .

Bibliography: 

Bibliography Images http://www.daviddarling.info/images/clavicle.gif http://4.bp.blogspot.com/_4Wo3iyKokqg/TQsXSY-VLlI/AAAAAAAAAHY/0Rjf9HYwPGs/s1600/clavicle.jpg http://www.teachpe.com/images/anatomy/bone_structure.jpg http://img.tfd.com/vet/thumbs/gr47.jpg http://kcfac.kilgore.cc.tx.us/mobleypageap1/1.%20Compact%20Bone%20(100x).jpg http://www.daviddarling.info/images/bone.jpg http://www.s-cool.co.uk/a-level/assets/learn_its/alevel/biology/movement-and-support-in-animals/bones/haversian.jpg Information Gray Anatomy http://www.bartleby.com/107/ Nature's Best: The Human Body http://library.thinkquest.org/2935/Natures_Best/Nat_Best_High_Level/Title_Net_Page/Title_page_h.html Guided Tour: Visible Human http://www.madsci.org/~lynn/VH/