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WHS Bones
bone anatomy and function
36
Physiology
12th Grade
12/07/2010

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Term
epiphysis
Definition
Ends of a long bone that forms a joint with another bone
Term
diaphysis
Definition
The shaft of a bone.
Term
periosteum
Definition
Tough, vascular covering (like a skin) around the bone.
Term
periosteum
Definition
Part of bone that is continuous with ligaments and tendons
Term
ligament
Definition
Connect one bone to another bone in a joint.
Term
tendon
Definition
connect muscle to bone
Term
spongy bone
Definition
Type of bone found in the epiphyses
Term
compact bone
Definition
tightly packed bone forming the diaphyses
Term
medullary cavity to hollow out the diaphysis and spongy bone in the epiphyses
Definition
What bone features help to reduce its weight?
Term
canaliculi
Definition
cellular processes that pass nutrients between osteocytes
Term
haversian canals
Definition
blood vessels and nerves travel through these canals
Term
collagen protein
Definition
What gives bone its resiliency and elasticity?
Term
inorganic salts (minerals) like Calcium, Phosphorous and magnesium
Definition
What gives bone its strength and resistance to crushing?
Term
Sickle Cell anemia
Definition
Disease caused by genetic mutation that creates abnormal hemoglobin and oddly shaped RBC's. Cause severe joint pain when blood clogs up joints.
Term
Osteons
Definition
Osteocytes live in concentric rings called ___________
Term
intramembranous ossification
Definition
Sheets of connective tissue are replaced by bone during development
Term
4 months
Definition
At about what age of the fetus does endochondra bone ossification begin?
Term
At about 5 yrs. it begins and it ends in the late teen years usually.
Definition
When does secondary ossification begin and end?
Term
osteoblasts
Definition
These cells form bony tissue.
Term
endochondral ossification
Definition
bone development that begans as hyaline cartilage models of the bone ossify
Term
primary ossification center in the center of the bone
Definition
Where does ossification begin in most of the bones in the body?
Term
osteoblasts
Definition
What cells replace the cartilage and connective tissue with bone tissue as the child develops?
Term
lengthening
Definition
When the epiphyseal plate disappears, bone ____________ stops.
Term
The epiphyses
Definition
Where are the secondary ossification centers located?
Term
osteoclasts
Definition
What cells eat away bone tissue? (bony callus, medullary cavity. . .)
Term
acids and enzymes
Definition
Osteoclasts use _____ and ______ to dissolve bone tissue
Term
resorption and deposition
Definition
Homeostasis of bone tissue occurs with the processes of __________ and ____________
Term
Vit. A C and D
Definition
What vitamins are important for bone development?
Term
Rickets
Definition
A lack of Vit. D during bone development might lead to deformed, bent bones--a condition called __________
Term
pituitary gland
Definition
Too little growth hormone from the ___________ gland can lead to dwarfism
Term
acromegaly
Definition
Excess growth hormone in an adult might lead to enlarged head, jaw, hands, feet
Term
calcitonin, pituitary hormone, thyroid hormone, sex hormones
Definition
What hormones promote bone growth?
Term
Calcitonin
Definition
What hormone stimulates osteoblasts to deposit Calcium in bone?
Term
Parathyroid hormone
Definition
What hormone promotes osteoclasts to dissolve bone minerals?
Term
The physical stress that athletes put on their bones stimulates the bones to thicken.
Definition
Why are the bones of athletes stronger and heavier than those of nonathletes?
Term
sex hormones (testosterone/testes and estrogen/ovaries)promote rapid bone growth at puberty when their production increases
Definition
Why do children grow considerable at puberty?
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