The System is made up of blood vessels that can carry blood away from and towards the heart.

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It is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.

It is a yellowish liquid component of blood that holds the blood cells.

This blood cells are also known as leukocytes.

This blood cells are also known as erythrocytes. They are biconcave discs that contain the oxygen-carrying protein called hemoglobin that gives it a red color.

It is a muscular organ, which pumps blood through the blood vessels of the circulatory system.

Blood vessels that carry oxygenated blood away from the heart.

Blood vessels that carry deoxygenated blood to the heart.