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20 Cards in this Set
- Front
- Back
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Name the functions of the skeletal system:
1 2 3 4 5 |
1. supports the body
2. protects organs 3. provides movement 4. stores minerals 5. site for blood formation |
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Bones are a system of ___ that muscles act upon to produce movement.
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levers
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The soft bone marrow in some bones produce _______.
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red blood cells
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`There are _____ bones in the adult human skeleton.
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206
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Bones can be divided into two parts:
1 2 |
1. axial - the central axis of the body (skull, spine,ribs)
2. appendicular - (arms, legs) |
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Why bones alive?
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Yes, they are a network of cells and protein, surrounded by deposits of calcium salts.
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The bone is surrounded by a tough layer of connective tissue called the ______.
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periosteum
peri-o-steum |
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How does oxygen and nutrients get through the periosteum?
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Through a network of blood vessels
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Beneath the layer of periosteum in the bone is a thick layer of ___ ___.
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compact bone
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Is the compact bone solid?
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No, although it is dense, it is network of tubes that contain blood vessels and nerves.
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What is the network of tubes in the compact bone called?
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Haversian canals
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The outer layer of the compact bone contains __ ___, which provides additional strength.
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spongy bone
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Why is spongy bone important to the ends of long bones and in the middle of flat bones?
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Because this is where most force is applied to bones.
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_____, which are mature bones cells, are embedded in the bone matrix.
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Osteocytes
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Name the three types of bone cells.
1 2 3 |
1. osteocytes
2. osteoblasts-produce bone 3. osteoclasts-breakdown bone |
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The soft tissue found in bones is called _______ ________.
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bone marrow
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Name the two types of bone marrow:
1 2 |
1. yellow - fatty cells
2. red - red bloods/platelets |
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The skeleton of an embryo is made up almost entirely of _______, a type of connective tissue.
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cartilage
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Cartilage is replaced by bone during the process of bone formation called _______.
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ossification
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How does the process of ossification occur?
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The osteblasts cells secrete mineral deposits that replace cartilage.
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