A blood cell that contains hemoglobin, which transports oxygen; also called a red blood cell
A blood cell that functions in fighting infections; also called a white blood cell.
The colorless fluid, derived from interstitial fluid, in the lymphatic system of vertebrates.
The liquid matrix of blood in which cells are suspended.
A pinched-off cytoplasmic fragment of specialezed bone marrow cell. Platelets circulate in the blood and are important in blood clotting.
One of the dead-end, multilobed air sacs where gas exchange occurs in a mammalian lung.
One of a pair of breathing tubes that branch from the trachea into the lungs.
A fine branch of the bronchi that transports air to alveoli.
The exchange of a substance or heat between two fluids flowing in opposite directions. For example, blood in a fish gill flows in the opposite direction of water passing over the gill, maximizing diffusion of oxygen into and carbon dioxide out of the blood.
the pressure exerted by a particular gas in a mixture of gases (for instance, the pressure exerted by oxygen in the air)
The volume of air a mammal inhales and exhales with each breath
In insects, a system of branched, air-filled tubes that extends throughout the body and carries oxygen directly to cells
The flow of air or water over a respiratory surface
Max tidal volume
Air that remains in lungs after a forced exhalation
Blood pressure in arteries during contraction of ventricles
Blood pressure in arteries during relaxation of ventricles