Bicarbonate: In medicine, bicarbonate usually refers to bicarbonate of soda (sodium bicarbonate, baking soda), a white powder that is a common ingredient in antacids. Also, the bicarbonate level is an indirect measure of the acidity of the blood that is determined when electrolytes are tested. The normal serum range for bicarbonate is 22’30 mmol/liter.
Biceps: A muscle that has two heads, or origins. There is more than one biceps muscle. The biceps brachii is the well-known flexor muscle in the upper arm; it bulges when the arm is bent in a C-shape with the fist toward the forehead. The biceps femoris is in the back of the thigh.
Bicornuate: Having two horns or horn-shaped branches. The uterus is normally unicornuate, but it can sometimes be bicornuate.
- Bicuspid aortic valve
Bicuspid aortic valve: An aortic valve in the heart that has two flaps (cusps) that open and close. A normal aortic valve in the heart has three flaps. There may be no symptoms of bicuspid aortic valve in childhood, but in time the valve may become narrowed, making it harder for blood to pass through […]
- Bicuspid valve
Bicuspid valve: One of the four valves of the heart, this valve is situated between the left atrium and the left ventricle. It permits blood to flow one way only, from the left atrium into the left ventricle This valve is more commonly called the mitral valve because it has two flaps (cusps) and looks […]
- Bicycle helmet
Bicycle helmet: A well-known but often neglected device designed to protect the head of a bicyclist. Helmets decrease the risk of head injuries (traumatic brain damage) by about 85%. However, only about 18% of bicyclists in the US use helmets all or most of the time. Universal helmet use could prevent an average of 500 […]