unit 4 final exam review 2026
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Number of bones in the human body Ans: 206 bones
Structure of a long bone Ans: Diaphysis (shaft), epiphyses
(ends), cartilage, periosteum, endosteum, marrow
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Compact bone Ans: Dense bone tissue that forms the outer
layer of bones
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Spongy bone Ans: Porous bone tissue found inside bones
Hyaline cartilage (location) Ans: Ends of long bones, nose,
trachea, larynx
Diaphysis Ans: Shaft of a long bone
Epiphysis Ans: End of a long bone
Epiphyseal plate Ans: Growth plate where bone lengthens
Periosteum Ans: Tough outer connective tissue covering bone
Endosteum Ans: Thin membrane lining the medullary cavity
Mature bone cells Ans: Osteocytes
Intramembranous ossification Ans: Bone forms directly from
connective tissue (flat bones)
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Endochondral ossification Ans: Bone forms from cartilage
model (long bones)
Flat bones Ans: Thin, flat bones (skull, sternum)
Short bones Ans: Cube-shaped bones (carpals, tarsals)
Irregular bones Ans: Complex shapes (vertebrae)
Long bones Ans: Longer than wide (femur, humerus)
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Synarthrotic joints Ans: Immovable (skull sutures)
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Amphiarthrotic joints Ans: Slightly movable (pubic symphysis)
Diarthrotic joints Ans: Freely movable (synovial joints)
Fibrous joints Ans: Dense connective tissue (sutures)
Cartilaginous joints Ans: Cartilage connects bones
(intervertebral discs)
Synovial joints Ans: Joint cavity present (knee, shoulder)
Articular cartilage Ans: Reduces friction at joint surfaces
Synovial membrane/fluid Ans: Lubricates joint
Meniscus Ans: Shock absorber in knee
Bursae Ans: Fluid-filled sacs reducing friction