4. Skeletal System

Question	Answer
Functions of the Skeletal System.	· Support of the body · Protection of soft organs · Movement due to attached skeletal muscles · Storage of minerals and fats · Blood cell formation
Four main bones	Long Bone Short Bone Flat Bone Irregular Bone
Label this long bone Image: bfd8273b-d87d-4e33-9e90-7fe226795e0b (image/png)	Image: 9797e379-da36-4a6e-aed3-187dc3561fcb (image/png)
Diaphysis	shaft, compact bone
Periosteum	a dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints
Epiphysis	end consisting of thin compact bone enclosing spongy bone
Articular cartilage	covers the epiphysis, is hyaline cartilage, prvides smooth slippery surface
Epiphyseal line in adults	separating the epiphysis from the diaphysis
Medullary cavity, or yellow marrow	stores adipose tissue in adults, is red marrow in infants. Red Marrow is in spongy cavities of flat bones and epiphyses of some long bones in adults
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Osteoblasts	Addition of calcium Bone growth/remodelling
Osteoclasts	Removing of calcium Bone growth/remodelling
Bone salts and Organic matrix	Bone salts and Organic matrix
Osteocytes	Bone Cells Osteo = Bone Cytes = Cells
Lacunae	cavities in the matrix were osteocytes are found
Haversian	central) canals are the centers of the lamellae; they carry blood vessels and nerves
Calcium salts	in the matrix provide the hardness
collagen fibers	provide flexibility and great tensile strength
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Fibrous Joints Tissue? Cavity? Movement?	Bones united by fibrous tissue no joint cavity Mostly immovable Image: b3fd4c37-a404-4f79-a0c9-cc4a1a0fe6f5 (image/jpg)
Cartilaginous Joint Tissue? Cavity? Movement?	Connected by Cartilage No joint cavity Slightly movable Image: 52b858e7-43f4-4624-bcef-bf1c33846233 (image/png)
Synovial Joint Tissue? Cavity? Movement?	Articular cartilage separates, joint cavity Synovial fluids is in cavity Fluid lubricates the joint Very movable Image: 4c2c7177-afc3-4762-ad4f-e8c005984940 (image/png)
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What are the features of a Synovial Joint	Articular Cartilage (hyaline cartilage) covers the ends of the bone Joint surfaces are enclosed by a fibrous articular capsule Have a joint cavity filled with synovial fluid Ligaments reinforce the joint
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List the 6 body movements	Flexion Extension Rotation Abduction Adduction Circumduction
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	Created by Jonathan Cash almost 9 years ago