Alveoli
Air sacs in the lungs where oxygen and carbon dioxide are exchanged.
Anatomy
Annulus
The ring around a heart valve where the valve leaflet merges with the heart muscle.
Abdominal Aorta
The portion of the aorta in the abdomen
Air sacs in the lungs where oxygen and carbon dioxide are exchanged.
The ring around a heart valve where the valve leaflet merges with the heart muscle.
The portion of the aorta in the abdomen