·heart muscle receives its oxygen and nutrient supply from
o atria
o ventricles
o aorta
o pulmonary veins
o coronary arteries
· the "cushion" between bones in joints is
o tendons
o cartilage
o ligaments
o fibroblasts
· muscle spindles
o muscle fibers coil
o pull bonds across joints
o sense contraction levels
o 3
· valves in the circulatory system prevent
o unnecessary entry of blood
o backwards flow of blood
o too much downstream pressure
· a double circulatory system is important for
o large animals
o fast metabolism
o an emergency backup
· the spleen
o filters blood
o contains a reserve of red blood cells
o forms white blood cells
· cardiac muscle is connected by
o tendons
o intercalated disks
o connective tissue
o ligaments
o 2
· the respiratory surface must exchange with the environment
o oxygen and co2
o nutrients and waste
o water and plasma
· nervous system input increases the of heartbeat
o strength
o rate
o duration
o all of these
· fluid within tissues is
o lymph
o plasma
o interstitial