PSL280H1 Lecture Notes - Lecture 7: Trachea, Bronchiole, Myoglobin
Document Summary
In order to compensate fr these 3 differences, they need to have differences. Venous return coing from a fin will be cold, so they line up the veins around the artery because the arteries will be carrying warm blood, allowing the artery blood to transfer heat to the venous blood. In marine mammals, they have sphincter musles allowing areas to be closed off. Because they have pooling areas for blood, the sphincter muscles close off these areas. All mammals have the windkessel effect, but the marine mammals have an altered aorta so it has an amplified effect retia mirabilia are twisted vessels that hold blood for when its needed. By having these double nerves, the core dive reflex can override more precisely than a local receptor. This allows the marine mammal to be more accurate in having appropriate blood flow.
