BIOL 3070 Lecture Notes - Lecture 2: Hypertension, Thermoregulation, Closed System
Document Summary
Supplements respirations such as dissolving gases into the blood and transporting them to organisms. Important role in nutrition; taking nutrients from the gut to the whole body. Excretion: metabolic wastes and urine brought to from the cells to the excretion system. Endocrine function by allowing the hormones to arrive to their targets. Immune function: through the elements of the fluid: wbc and through the lymphatic system. Fluid , in open system (hemo), in closed system known as blood. Vessels or tubes: arterial system, capillary network, venous system. Central circulation heart and major blood vessels. Peripheral circulation: arteries, capillaries and veins: mechanisms responsible for circulation: Mainly 4 different things, some organisms have only 1. Contraction of the pump (heart in mammals) Elastic recoil of arteries in closed circulatory system. Squeezing of blood vessels during body movements help in facilitating the movement of blood through the vessels. Peristaltic contractions of smooth muscles covering blood vessels.
