1. Differences between artery, capillary and vein
Artery Capillary Vein
Has no valve Has no valve Has valve
Except : semilunar valve in
aorta
Tunica media thick No tunica media Tunica media thinner than in
artery
Tunica externa thick No tunica externa Tunica externa thinner than in
artery
Has 3 layers Only one layer : endothelium Has three layers
cell
Highest blood pressure Lowest blood pressure Lower blood pressure than
artery, higher than in capillary
capillary<vein<artery
Highest velocity Lowest velocity Lower than artery, higher than
capillary
capillary<vein<artery
Smallest TCSA Highest TCSA Higher TCSA than artery,
smaller TCSA than capillary
Transport oxygenated blood Transport both oxygenated and Transport deoxygenated blood
Except: pulmonary artery deoxygenated blood Except : Pulmonary vein
No gas exchange occur Gas exchange occur No gas exchange occur
No absorption of nutrient occur Absorption of nutrient occur No absorption of nutrient occur
*Note : TCSA is Total Cross sectional area
: Tunica externa = tunica adventitia
copyright©nik_ikmal2013