BIO 1305 Lecture Notes - Lecture 13: Superior Vena Cava, Venae Cavae, Autonomic Nervous System
16 Dec 2017
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Open circulatory system - hemolymph bathes the organs directly. Closed circulatory system - blood can travel through vessels and is distinct from the interstitial fluid. Gastrovascular cavity: describe the path of a red blood vessel that just left the aorta and returns to the right atrium. (discuss important definitions along the way. ) Blood leaves the aorta (heart) to the capillary beds to the forelimbs and hindlimbs. Oxygen poor blood from the head, neck and forelimbs is channeled into the superior vena cava. The inferior vena cava drains blood from the trunk and hind limbs. The 2 venae cavae empty their blood into the right atrium. Capillaries important for gas and nutrient exchange: map out the differences between single and double circulation. In single circulation (found in fish), the blood is pumped from the heart to the gill capillaries and then to the body capillaries. From the body capillaries, the blood returns to the heart.
