Jawed vertebrates have an adaptive immune system, based largely on white blood cells. White blood cells help to resist infections and parasites. Platelets are important in the clotting of blood. Blood is …

Dec 15, 2025 · Blood is a fluid that transports oxygen and nutrients to cells and carries away carbon dioxide and other waste products. It contains specialized cells that serve particular functions. These …

Blood is a specialized fluid that constantly flows throughout your body. It’s made of plasma, red blood cells, white blood cells and platelets.

Detailed information on blood, including components of blood, functions of blood cells and common blood tests.

3 days ago · Drs. Alderuccio and Noy share their insights on specific avenues for the expansion of the MZL care landscape. Find the full review series in volume 147 issue 2 of Blood journal.

blood noun [U] (LIQUID) Add to word list A2 the red liquid that is sent around the body by the heart, and carries oxygen and important substances to organs and tissue, and removes waste products

The main job of red blood cells, or erythrocytes, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs.

The blood that runs through the veins, arteries, and capillaries is known as whole blood—a mixture of about 55% plasma and 45% blood cells. About 7% to 8% of your total body weight is blood.

Blood is made up of 55% plasma and 45% formed elements—red blood cells, white blood cells, and platelets. Blood is fluid connective tissue that circulates throughout the body.

Giving blood is a simple thing to do, but it can make a big difference in the lives of others. Make a blood donation appointment with the American Red Cross today.