8.3 Flashcards
what does blood carry?
glucose
amino acids
hormones
ions
plasma proteins
red blood cells
white blood cells
platelets
roles of the blood
transports oxygen and carbon dioxide
transports food
transports hormones
transports antibodies
acts as a pH buffer
what is the tissue fluid?
the fluid which surround cells in tissues
what does the tissue fluid contain?
white blood cells
water
dissolved solutes
what does the lymph contain?
white blood cells
water
dissolved solutes
antibodies
diagram of composition of:
blood
tissue fluid
lymph
what cannot pass through into the tissue fluid?
large plasma proteins
RBCs
they are too large to fit through fenestrations in the capillary walls
what is the hydrostatic pressure?
pressure exerted by fluid
what is the oncotic pressure?
pressure exerted by plasma proteins
what happens to the hydrostatic pressure between the arterial end and venule end?
it decreases
what happens to the oncotic pressure between the arterial end and venule end?
stays the same
proteins remain in the blood
what is the pressure at the arterial end?
higher hydrostatic
lower oncotic
so fluid is forced into the TISSUE FLUID by osmosis through fenestrations in the capillaries
what is the pressure at the venous end?
higher oncotic
lower hydrostatic
so fluid is forced back into the CAPILLARIES by osmosis through the fenestrations
what happens to excess tissue fluid?
it is returned to the blood via the lymphatic system
what is the lymph used for?
to clean the blood
