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Circulatory System Functions of Circulatory System Transportation Oxygen Nutrients Hormones Antibodies Carbon dioxide Waste Fluid balance Intracellular fluid • Fluid in a cell Extracellular fluid • Fluid surrounding a cell Parts of the Circulatory System 3 main parts Heart • Pumps blood Blood • Transports nutrients Vessels • Blood travels through Divisions of Circulatory System Pulmonary circulation Blood circulating from heart To lungs Back to the heart Divisions of Circulatory System Systemic circulation Blood circulates from the heart To all cells and tissue Except lungs Back to the heart. Heart Function To pump and receive blood. • 2 pumps in one Right heart • Receives and pumps deoxygenated blood Left heart • Receives and pumps oxygenated blood Chambers of the Heart Atria Upper chambers • R+ L atrium Receive blood Ventricle Lower chambers • R + L ventricle Pumping chambers Valves One way ‘doors’ between chambers Blood Flow through the Heart Layers of the Heart Endocardium Inside layer Myocardium Middle layer • Heart wall Epicardium Outside layer of heart • Inside layer of the pericardium Layers of the Heart Pericardium Pericardium Double walled sac that surrounds the heart • Produces pericardial fluid • Reduces friction created w/ heart beats Blood Function To move blood cells throughout the body. Plasma Liquid portion • 90% water Corpuscles Blood cells • Erythrocytes • Leukocytes • Thrombocytes Corpuscles / Blood Cells Erythrocytes RBC’s (red blood cells) Contain hemoglobin • Carry O2 • Eliminate CO2 • ‘transporters’ Thrombocytes Platelets • Clot the blood Leukocytes WBC’s (white blood cells) ‘infection fighters’ 5 types • Basophils • Eosinophils • Lymphocytes • Monocytes • Neutrophils Vessels Function To carry blood / blood cells to all the parts of the body. 3 main types Arteries Veins Capillaries Artery Largest blood vessel Carry blood away from the heart Spurt if cut Can detect a pulse Vein Smaller than arteries Carry blood back to the heart. Closer to skin • Appear ‘bluish’ • Do not spurt w/ cut • Cannot detect a pulse Capillary Smallest of the vessels Microscopic Connect arteries to the veins. Gas exchange takes place • O2 • CO2 Conclusion The circulatory system in dentistry is related to overall health, oral infection, and administration of medications. Any questions?????? 1. What are the three types of vessels? 2. Order the three types of vessels from the smallest to the largest unit 3. What are the three parts of the circulatory system? 4. What is the difference between pulmonary and systemic circulation? 5. What are the three layers of the heart?