Question | Answer |
funtions of skeletal system | shape and support, enables movement, protects internal organs, produces blood cells, stores certain materials |
vertebrae | 26 small bones that make up your backbone |
marrow | soft connective tissues in the spaces in bone |
cartilage | a connective tissue more flexible than bone |
joint | a place where two bones come together that allows bones to move in different ways. |
immmovable joints | joints that connect bones allowing very little or no movement |
movable joints | most joints are this, they allow the body to have a wide range of movement. |
ball and socket joint | joints that allow a lot of movement |
pivot joint | a joint allows one bone to rotate around the other |
hinge joints | a joint that allows extensive forwand and backward motion |
gliding joint | a joint that allows bones to slide over each other |
ligament | a strong connective tissue that holds movable joints |
how to take care of your bones | balanced diet and regular exersice |
osteoporosis | mineral loss of bones |
fracture | a break in a bone |
sprain | when ligaments are stretched ant torn in places |
dislocation | when a bone comes out of its joint |
x-ray | an image taken to see if a bone has been broken they pass through skin and tissue to get photos if area beneath the surface |
magnetic resonance imaging | images that are very clear and can be of tissues |
preventing skeletal injuries | warming up before exersice, exercsing in safe places and wearing the proper safety eqipment |
involuntary muscles | muscles that are not under concoius control |
voluntary muscles | muscles that are under your control |
types of muscles | smooth, skeletal, cardiac |
skeletal muscles | muscles that are attached to your skeleton |
smooth muscles | involuntary muscles that are found on insides of many inner organs |
cardiac muscle | muscle that is involuntary and does not get tired. |
muscles at work | muscle cells can contract, not extend, so skeletal muscles work in pairs. one muscle contract while the other goes back to its normal length. |
skin: tough covering | skin cover the body, preventing loss of water. it protects from infections and injuries and regulates body temperatures. it eliminates waste and gathers information about and environment and also produces vitamin D. |
epidermis | the outer or top layer of skin. |
dermis | the lower layer of skin. it contains blood vessels and nerves. |
pores | openings at the surface of the skin. |
follicles | structures that strands of hair grow in in the dermis. |
caring for skin | eat properly, drink water, limit sun exporsure, keep skin clean |
cancer | a disease when certain body cells divide uncontrollably. this can be caused by to much sunlight damage. |
acne | a bacterial infection to skin |