Science / Biology / Arteries: Thick-walled vessels that carry blood away from the heart. Singular=artery.

Coronary Arteries

Science / Biology / Coronary Arteries: Arteries that supply the hearts muscle fibers with nutrients and oxygen. MORE


Health / Fitness / Arteriosclerosis: Hardening of the arteries due to conditions that cause the arterial walls to become thick, hard, and none elastic. MORE


Health / Fitness / Muscle: Tissue consisting of fibres organized into bands or bundles that contract to cause bodily movement. Muscle fibres run in the same direction as the action they perform. MORE


Science / Biology / Capillaries: Small, thin-walled blood vessels that allow oxygen to diffuse from the blood into the cells and carbon dioxide to diffuse from the cells into the blood. MORE

Circulatory System

Science / Biology / Circulatory System: One of eleven major body organ systems in animals; transports oxygen, carbon dioxide, nutrients, and waste products between cells and the respiratory system and carries chemical signals from the endoc MORE


Science / Biology / Heart: The multicellular, chambered, muscular structure that pumps blood through the circulatory system by alternately contracting and relaxing. MORE