BIOL1003 Lecture Notes - Lecture 10: Pulmonary Circulation, Pressure Gradient, Sinoatrial Node

• School: University of Sydney
• Department: Biological Sciences
• Course: BIOL1003
• Professor: Osu Lilje

Document Summary

Homeostasis of blood pressure: divisions of the circulatory system. Structural division: arterial system, venous system (returns blood under very low pressure back to the heart, capillary beds(where the exchange occurs, lymphatics (makes the capillary exchange happen in the tissues) Functional division: systemic, pulmonary, functions of the circulatory system. Cardiovascular system: supply of material to body tissues (nutrients, oxygen, hormones, removal of waste products of metabolism (ammonia and urea from protein metabolism, toxins, carbon dioxide, distribution of blood volume. 5% - capillaries: movement of blood through the heart. When the right atrium contracts, it pushes deoxygenated blood through the tricuspid valve into the right ventricle. Right ventricle will then contract then push blood through the pulmonary semilunar valve up the pulmonary trunk which fork to go to the left and right lungs. When it comes back through the pulmonary vessels, it is oxygenated and at low pressure into the left atrium and atrium.