skeletal system - Weebly
Transcript of skeletal system - Weebly
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Skeletal System
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� 206 (as an adult)
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� 270!
� Bones fuse together over time
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� Purpose:
◦ Protects Organs
◦ Support, protection, and flexibility
◦ Forms blood cells
◦ Stores Calcium (essential vitamin)
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� Major Purpose: Protect the Brain!!!!
� 22 Bones in the skull
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� Basically your upper chest area
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� Manubrium: forms joints with clavicles/ attaches to ribs
� Body: attaches to ribs
� Xiphoid Process: attaches to diaphragm and other muscles
◦ Cartilage (flexible!) is eventually replaced by bone in adulthood
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� Ribs: Protect the lungs and heart ◦ Also aids in breathing
� Clavicle: Stability and muscle attachment◦ One of the most commonly broken bones
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� All contribute to arm motion
� Ulna: Radial
� Radius: Distal
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� 7
� 12
� 5
� Spine = Vertebra
Verte
bra
l Colu
mn
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� Sacrum: Connects spine to hip bones
� Coccyx: Attachment site for tendons, ligaments, and muscles◦ May fuse to sacrum later in life
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� Takes place in Red Marrow
� Only in: long bones, flat bones (ribs and cranial), vertebrae, and pelvis
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� All blood cells (Red, white [T cells…]) are produced in red marrow
� Produced by stem cells!
� Blood cells last at most a few days!
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� https://www.youtube.com/watch?v=rDGqkMHPDqE