Final answer:
Partial pressure measures the individual pressure of a gas within a mixture, and torr is a unit of pressure. Heme is a component of hemoglobin, the respiratory pigment in vertebrates, which carries oxygen and carbon dioxide in the blood.
Step-by-step explanation:
Partial pressure refers to the pressure that a single gas in a mixture of gases would exert if it alone occupied the entire volume. In the context of respiratory physiology, it is crucial in understanding how gases like oxygen and carbon dioxide exchange between the air and our blood. A torr is a unit of pressure equal to 1/760th of an atmosphere, typically used in medical and scientific settings, it is nearly identical to the millimeter of mercury (mmHg).
A respiratory pigment is a substance in the blood or hemolymph of many animals that carries oxygen to the cells and carbon dioxide to the lungs or gills to be expelled. Heme is a component of the hemoglobin molecule; it is a ring-shaped molecule with an iron atom at its center that binds oxygen.
The respiratory pigment found in vertebrates is hemoglobin, a heme-containing protein that is responsible for oxygen transport in the blood. Hemoglobin allows for efficient oxygen transport from the lungs to the tissues and carbon dioxide transport back to the lungs for expulsion.