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Skeletal system: Difference between revisions
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There are three different types of bone in the skeletal system. These are the outer layer of the bone, the compact middle layer, and the spongy third layer. | There are three different types of bone in the skeletal system. These are the outer layer of the bone, the compact middle layer, and the spongy third layer. | ||
=== | === Periosteum === | ||
The | The periosteum is hard and smooth. It provides protection to the rest of the layers of the bone. It is almost like the "skin" of the bones. The periosteum provides a site for the attachment of muscles, and also contains nerves, blood vessels, and lymphatic vessels.[http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookMUSSKEL.html] | ||
=== Compact === | === Compact === | ||
The compact bone is extremely dense and surrounds the spongy bone. | The compact bone is extremely dense and surrounds the spongy bone. The compact bone also contains many Haversian canals, which also contain nerves and blood vessels. This layer of bone gives the skeleton its strength and allows it to support your bodies mass.[http://webschoolsolutions.com/patts/systems/skeleton.htm] | ||
=== Spongy === | === Spongy === | ||
The spongy bone is where all of the blood cells are created from the bone marrow. | The spongy bone is where all of the blood cells are created from the bone marrow. Spongy bone contains two different types of bone marrow: red and yellow marrow. The red bone marrow produces red and white blood cells and platelets. The yellow bone marrow, however, is used to store fats. | ||
== Related References == | == Related References == | ||
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*[http://www.leeds.ac.uk/chb/lectures/anatomy4.html Introductory Anatomy: Joints] Faculty of Biological Sciences, University of Leeds | *[http://www.leeds.ac.uk/chb/lectures/anatomy4.html Introductory Anatomy: Joints] Faculty of Biological Sciences, University of Leeds | ||
*[http://www.pueblo.gsa.gov/cic_text/health/shoulderqa/shoulderqa.htm Shoulder Problems] NIH | *[http://www.pueblo.gsa.gov/cic_text/health/shoulderqa/shoulderqa.htm Shoulder Problems] NIH | ||
*[http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookMUSSKEL.html Muscle and Skeletal System] Online Biology Book | |||
{{Biology portal}} | {{Biology portal}} | ||
