Dictionary

Body systems

Anatomy and the conditions of each body system, from the heart and lungs to the skin.

bronchioleOne of the smallest airways in the lungs, branching from the bronchi and leading to the air sacs.

bronchiolitisInflammation of the bronchioles, the smallest airways in the lungs, most often in babies and young children.

bronchitisInflammation of the bronchi, the large airways that carry air into the lungs.

bronchospasmA sudden tightening of the muscles around the airways that narrows them.

bronchusOne of the large air tubes that branch from the windpipe into each lung.

bruiseA discolored area of skin where blood has leaked from small broken vessels into the tissue underneath.

bruitA whooshing or blowing sound heard with a stethoscope over a blood vessel.

bullaA large blister filled with clear fluid.

bundle of HisA band of special heart fibers that carries the electrical signal from the AV node down to the ventricles.

burnAn injury to the skin or deeper tissues caused by heat, chemicals, electricity, radiation or friction.

buttockOne of the two rounded areas of muscle and fat at the back of the hips that a person sits on.