outer most layer made of connective tissue
middle layer elastic connecctive smooth muscle tissue
Inner most layer contains endothylium and some connective tissue
have valves, with large lumen, thin collapsing walls, return blood to heart, 3 tunics with valves. have deoxigenated blood
do not have valves, thick walls that stay open, smaller lumen, start big then branch to get smaller, takes blood away from heart, under high pressure, thick wall is needed, have oxygenated blood
3 in the artery
largest, closest to heart, getting blood, contractions take blood to large arteries
Small branches formed from small arteries, taking blood to capilleries
microscopic, exchange of molecules between blood and vessels. single tunic interna
plexuses, branching networks through tissues
regulates blood flow, between arterioles and capillery network, circular smooth muscles. contraction (close) relaxation (open)
Recieves blood from capillaries network, externa and interna tunics, NO MEDIAL
Starts in left ventrical then to righ atrium, circulation of blood between heart and lungs, arteries-deoxigenated blood away from heart to the lungs, capilleries-gas exchange taking oxygen out of air ridding of CO2, return oxygenated blood to heart.
starts in right ventrical then to right atria, circulating blood everywhere except blood
Hepatic portal system
system of veins involving liver, 2 capilleries connected by veins, absorbing nutrients from food we digest, intestinal capilleries-splenic vein-superior mesentric vein-inferior mesentric vein-hepatic portal vein-liver capillaries-hepatic viens
Fetal Circulation umbilical vein
Blood different from new born
umbilical vein-oxigenates blood during fetal period. between cord and fetus heart (going to liver)
Fetal Circulation Ductus venosus
Takes blood from liver into inferior vena cava to right atrium.
hole between right and left atrium, closes off after birth
Tiny blood vessel between pulminary trunk and aeorta sending small amount of blood by passing lungs going straight to aeorta. becomes just vessels after birth.
(2), waste products need to be removed, has deoxygenated blood and waste products. mother takes from this and removes.