BIOB34H3 Study Guide - Midterm Guide: Respiratory Pigment, Hemolymph, Extracellular Fluid
Document Summary
=> how the oxygen, once it enters into the circulatory system, dissolved into the circulatory system of an animal: circulatory fluid is divided into two further categories, blood and hemolymph, which are differentiated below. Primary factor leading to low oxygen concentration in fluids. Even at very high partial oxygen pressures, the dissolved oxygen into the circulatory fluid remains very low. The sea urchin, pictured above, can use this technique as oxygen supply because of its relatively low oxygen demand (metabolism) Oxygen bound to hemoglobin does not contribute to the partial pressure of oxygen in the blood, and so this value stays low in order to encourage further high rates of oxygen diffusion into the blood. Partial pressure of oxygen tends to be high, lots of incoming oxygen is available: hemoglobin will bind to oxygen at this point, oxygen doesn"t count when considering the po2 of the blood (because it went to hemoglobin)
