Oxygen binding by hemoglobin

partial pressure

pressure exerted by a single component of a mixture of gases. portion of the total pressure exerted by a single gas molecule.

Torr

760 torr, used in measuring partial vacuums. Which is equal to 133.32 pascals. 1 atm = 760 torr

Respiratory pigments

Metalloproteins (specialized proteins) responsible for transporting O2 (hemoglobin or myoglobin) and increases O2 carrying capacity of the blood. Have high affinity for oxygen. Increase solubility of O2 in blood.

Heme

an essential component found in the structure of various hemoproteins, including hemoglobin, myoglobin, and cytochromes. It is a complex organic molecule that consists of an iron ion (Fe2+) contained within a heterocyclic organic compound known as a porphyrin ring.

Respiratory Pigment found in vertebrates

hemoglobin

Respiratory pigment found in decapod crustaceans

hemocyanin