Blood vessels
Veins are tubes that carry blood back to the heart. This blood is usually deoxygenated, but in the case of the pulmonary vein, the blood is oxygen-rich.
Blood vessels are the tubes that carry blood. The smallest of the blood vessels are the capillaries.
The tubes that carry blood are known as the blood vessels. These include the capillaries, arteries, and veins.
The tubes that carry blood around the body are blood vessels. They comprise arteries, veins, and capillaries.
The tubes that carry blood are known as the blood vessels. They include arteries, veins, and capillaries.
Blood vessels transport blood throughout the body. There are different types of blood vessels - the main ones being arteries, veins and capillaries. Arteries carry blood away from the heart, veins carry blood towards the heart and capillaries are where gas exchange occurs.
Tubes that carry blood are collectively known as blood vessels. These include veins, arteries, and capillaries.
The blood vessels are the tubes of various sizes that carry blood. They include arteries, capillaries, and veins.
Blood vessels are the tubes that carry blood. The three types of blood vessels are arteries, capillaries, and veins.
The blood vessels are, collectively, the tubes that carry blood throughout the body. These tubes include arteries, capillaries, and veins.
The tubes that carry blood are known collectively as the blood vessels. They include veins, arteries, and capillaries.
Blood vessels are the tubes that carry blood around the body. Blood vessels include capillaries, veins, and arteries.