Mass flow Flashcards
how are substances moved over short distances
osmosis,active transport,and diffusion
how are substances trasported over long distances
mass flow
in mass flow a fluid moves in a particular direction due to a _____
force
what are examples of masss flow in livign organisms
movement of water,dissolved solutes and susoended objects
what does mass flow require to pump the fluid
a source of energy although it is much faster than diffusion
what are examples of mass flow in general
circulatory systems in animals,xylem and phloem in plants
what are all the reasons large multicellular organisms need to use mass flow
surface area:volume ratio too small
Distance for diffusion too long
Mass flow takes gases and nutrients close to all cells
what type of circulatory systems do mammals have
a closed double circulatory system
in a closed double circulatory system what doe the double mean
blood passes through the heart twice in one
in a closed double circulatory system what doe the closed mean
Blood is enclosed within blood vessels and pumped around by the heart
what does the blood passing through the heart twice in one enable
it enables to separate circulation to lungs so can maintain higher pressure to the rest of body organs
what do arteries do
take blood away from the heart to the rest of the body
what do veins do
return blood back to the heart-blood is under low pressure
what do capillaries do
connect arteries and veins,site of exchange
what type of muscle is the heart
a cardiac muscle
