musculoskeletal system
what are the building blocks of life?
cells
brings blood to the heart
veins
the basic rhythm of the heart is called ___ rhythm
sinus
a break in a bone
fracture
like a door hinge, can flex or extend only
hinge joint
____ acids are the building blocks of protein
amino
the human heart has __ chambers
four
maintains the basic rhythm of the heart
pacemaker
where the bone breaks into two or more separate pieces
complete fracture
made of a rounded end of one bone fitting into a rounded cavity in another bone, allowing the maximum range of movement
ball-and-socket joint
copies of the protein-building instructions from the nucleus
messenger RNA
carries the air you breathe to your lungs
trachea
fluid in the lungs
pulmonary edema
when the bone is cracked but not broken all the way through
incomplete fracture
a relatively simple joint in that in primarily allows rotation
pivot joint
the envelope that contains the other components of the cell
plasma membrane
the valves guarding the exit from the ventricles
semilunar valves
purkinje fibers cause the heart to ___ from the bottom up and not from the top down
contract
when the bone is broken but does not break through the skin
simple fracture
a joint that moves back and fourth and up and down
saddle joint
DNA is a big molecule made up of two long strings of smaller molecules called ___
nucleotides
collects blood as it returns to the heart
atria
the tunica ___ in muscular arteries is mainly made of smooth muscle and has fewer elastic fibers
media
where the fractured bone breaks through the skin
compound fracture
made up of flat surfaces and allows only a small gliding motion
plane joint