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Biology
Body systems
Skeletal system
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chloe wang
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Cards (22)
Bone is made of
compact
and
spongy bone
Bones are made of
calcium
,
phosphorus
,
sodium
, and other
minerals
as well as the
protein collagen.
The four different classifications of bones are
long
,
short
,
flat
,
irregular
The human body has
206
bones in total, including the bones in the
hands
,
feet
, and
spine.
Long bones produce
blood cells
Short bones
specialise in fine movement
Flat bones
are used for protection
Irregular
bones work together and act like a
shock absorber
Joints
are found where two bones meet in the body
Cartilage
is the smooth material covering the ends of bones
Synovial fluid allows
bones
to
slide over eachother
Ligaments
hold bones together
Types of joints are
hinge
,
ball and socket
,
pivot
, and
saddle
Hinge joints
move only in one plane
In a ball and socket joint, which bone can make all kinds of movements?
The
ball
shaped one
Elbows and knees are examples of
hinge joints
Shoulders and hips are examples of
ball
and
socket
joints
The
neck
to the
head
is an example of a
pivot
joint
Saddle joints allow movement in
two directions
Your carpels are an example of
saddle joints
Muscles
are attached to bones by
tendons
In
antagonistic
pairs, one muscles
contracts
and the other
relaxes