Blood vessels are ____a____ structures which transport _____b_____ throughout the body. There are _____c____ types of blood vessels in our body. The _____d______ carry oxygenated blood, whereas ______e_____ carry deoxygenated blood. The ______f_____ connect the arteries with the veins.
a- hollow tube
b- blood
c- three
d- arteries
e- veins
f- capillaries