Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away …

Dec 16, 2018 · View all available appointment times and donation types, then select the one convenient for you. Not sure what donation type is right for you? Learn more about giving whole blood, double …

2 days ago · In this special episode, Blood editor Dr. Laura Michaelis interviews Dr. Arielle Langer and Blood Associate editor Dr. Marc Blondon for this special Maternal Health episode.

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

It has four main components: plasma, red blood cells, white blood cells, and platelets. The blood that runs through the veins, arteries, and capillaries is known as whole blood—a mixture of about 55% …

Nov 7, 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 …

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

Jan 16, 2024 · Blood circulates throughout the body, transporting substances essential to life. Here, learn about the components of blood and how it supports human health.

May 11, 2023 · Blood has many functions in your body. Blood tests help doctors check for certain diseases and conditions. Learn about blood types and blood tests.

American Red Cross has blood drives and blood donation centers across the United States. Search for a blood donation location near you.