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Blood is the life fluid of the body as it provides nourishment to cells and tissues. Discover the cellular components of blood and their function. Regina Bailey is a board-certified registered nurse, science writer blood orange price educator. Her work has been featured in “Kaplan AP Biology” and “The Internet for Cellular and Molecular Biologists.

The major components of blood include plasma, red blood cells, white blood cells, and platelets. Plasma: This major constituent of blood comprises about 55 percent of blood volume. It consists of water with several different substances dissolved within. Plasma contains salts, proteins, and blood cells.

Plasma also transports nutrients, sugars, fats, hormones, gases, and waste material contained within blood. These cells determine blood type and are the most abundant cell type in the blood. Red blood cells have what is known as a biconcave shape. Both sides of the cell’s surface curve inward like the interior of a sphere.