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BIOL Quiz 3
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How many bones are there in the body?
206
What 2 parts is the skeletal system divided into?
the axial and the appendicular
what major bones make up the axial skeleton?
skull
vertebrae
rib cage
What two categories make up the appendicular skeleton?
upper and lower limbs
What are the functions of the skeletal system?
protection
movement (with muscles)
--Bones act as levers
--joints act as pivots
Mineral storage
Blood cell production by red marrow (RBC's, WBC's, plateletets)
Explain the mineral storage of the skeletal system
mostly calcium
some phosphorus
when calcium runs low in blood, it can be extracted from skeleton
What are the 2 types of bone tissues? Describe them.
Spongy bone--aka cancellous bone; lacy network of bone fibers (trabeculae)
Dense bone--outter lining; covers spongy bone as well
what are the spaces filled with inbetween trabeculae?
marrow
what are the 4 bone shapes?
long bones
short bones
flat bones
irregular bones
which bones are long bones?
Bones of the limbs:
humerus
radius
ulna
femur
tibia
fibula
phalanges
what are the two main parts of a long bone?
-Describe each.
Epiphysis--located at either end of bone (top and bottom); wide for joint stability and attachments
Diaphysis--contains medullary cavity; refers to core part of bone
Author
arakakie
ID
196775
Card Set
BIOL Quiz 3
Description
Skeletal System
Updated
1/31/2013, 3:18:52 AM
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