blood vessels

.......... have thick elastic walls to withstand the high blood pressure resulting from the strong pumping of the heart.

........... These are small, thin blood vessels that connect the arteries and veins together for the exchange of gases and nutrients.

................. carry blood AWAY from the heart.

There are three main types of blood vessels: .................

Veins carry ................, except the Pulmonary vein.

.............are elastic, muscular tubes that carry blood to every part of the body.

Arteries carry ..............................., except the Pulmonary artery.

Veins have .......... elastic walls than arteries as they carry blood at a lower pressure.

. Arteries: Example the .................... , the large artery leaving the heart.

........... have very thin non elastic walls one cell thick.

............ : Example the Superior and Inferior Venacava which carry blood from the body back to the heart.