Minis test: Blood and blood vessels Flashcards
Describe difference between open and closed circulatory system
Closed: blood moved inside vessels
open: no blood vessels
Describe difference between single and double circulatory system
single: Blood passes thru the heart once for each circuit of the body
double: Blood passes thru twice
Function of artery
carry blood from heart to rest of body
function of arteriole
branch off from artery to carry blood to tissues
function of capillary
exchange of substances between blood and cells
function of venule
connects tissues to veins
function of vein
carry blood from tissues to heart
Type of blood carried in each type of blood vessel
Oxygenated= arteriole + artery (not pulmonary)
Deoxygenated= venule + vein (not pulmonary)
capillary - both
Pressure of blood in each vessel
Artery= very high
arteriole= high
capillary= very low
vein + venule = low
describe how tissue fluid and lymph are formed from plasma (8)
-At the start of the capillary network, near the artery, the hydrostatic pressure of the blood is high
-this forces water+ small molecules out of the blood into the tissue fluid
-at the end of the capillary network, near the vein, the hydrostatic pressure in the blood is lower
-However, the oncotic pressure of the blood is high
-this is because the blood has a lower water potential than the tissue fluid
-Most water re-enters the blood, by osmosis
-Excess tissue fluid enters lymph capillaries
-The lymphatic system returns the fluid to the blood
are there lymphocytes in the tissue fluid
No, but phagocytes are
are there proteins in tissue fluid
only a few
are there proteins in lymph
only antibodies
Where are platelets found
only in blood
Explain why RBCs are not found in tissue fluid or lymph
-RBCs are too large to pass through the capillary endothelium into the tissue fluid
-the lymph is formed from the tissue fluid
