Learn about the anatomy of the heart and how its chambers, ... Heart Anatomy, Function, and Blood Circulation. Written by Kathryn Whitbourne. Medically Reviewed by Shruthi N, MD on August 22, 2024.

Platelets are made in your bone marrow. These are the smallest types of blood cells, with each one living approximately 7 to 10 days. Unlike red and white blood cells, platelets do not contain nuclei.

White blood cell structure and anatomy. All white blood cells are produced by your bone marrow, and are then released in your bloodstream as well as lymph fluids.