Final answer:
Platelets, white blood cells, and red blood cells are components of blood, while pulmonary fluid is not.
Explanation:
Platelets, white blood cells, and red blood cells are all components of blood. Pulmonary fluid is not a component of blood; it relates to the fluid found in the lungs. Platelets are responsible for blood clotting, white blood cells are part of the immune response, and red blood cells transport oxygen.
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