Name four important things bones do for the body
a place for sucles to attache for movement
produce blood cells
protect vital organs (brain, heart, lungs)
What is bone made of?
meshar - a matrix of sticky fibers called chondrin and collagen mixed with calcium phospate.
This combination of stretchy fibers and hard minerals make the bones strong and not brittle.
What cushions the joints?
What connects bones to bones?
What connects muscles to bones?
What are the three types of muscle?
skeletal - are striated (striped)
Where are skeletal muscles found in the body?
these are voluntary muscles attached to bones, used for movement
Where are smooth muscles found?
autonomic systems (involuntary)
Where are cardiac muscles found?
in the heart
Is lifting voluntary or involuntary?
Is digestion voluntary or involuntary?
Is running voluntary or involuntary?
Is breathing voluntary or involuntary?
Is swallowing voluntary or involuntary?
Is singing voluntary or involuntary?
Is whistling voluntary or involuntary?
Is choking voluntary or involuntary?
Muscles operate in __________ pairs.
Muscles can only ___________ not __________.
A muscle that pulls a limb up is called a ________.
An example of a flexor muscle is the __________.
A muscle that straightens a limb is called an ____________.
An example of an extensor muscle is the __________.
Name four ways to keep your bones healthy.
drink milk for calcium (one of the main ingredients of bone)
weight-bearing exercise - strengthens bone
wear protective gear
eating enough protein and leafy greens
What is a sprain?
stretching or tearing of a ligament, the tough, fibrous tissue that connects bones to other bone.
What is osteoporosis
when bones become holey and lose strength because they break down faster than they are rebuilt
What is tendonitis?
caused by strong or repeated movement that creates friction between tendon and bone
What is muscular dystrophy?
a group of diseases which cause muscles to progressively weaken and waste away. there is no known cure
7th grade science review