Circulatory System

Functions of Circulatory System  Transportation Oxygen Oxygen Nutrients Nutrients Hormones Hormones Antibodies Antibodies Carbon dioxide Carbon dioxide Waste Waste  Fluid balance Intracellular fluid Fluid in a cell Extracellular fluid Fluid surrounding a cell

Parts of the Circulatory System  3 main parts Heart Heart Pumps bloodPumps blood Blood Blood Transports nutrientsTransports nutrients Vessels Vessels Blood travels throughBlood travels through

Divisions of Circulatory System  Pulmonary circulation Blood circulating from heart Blood circulating from heart To lungs To lungs Back to the heart Back to the heart

Divisions of Circulatory System  Systemic circulation Blood circulates from the heart Blood circulates from the heart To all cells and tissue To all cells and tissue Except lungs Except lungs Back to the heart. Back to the heart.

Heart  Function To pump and receive blood. To pump and receive blood. 2 pumps in one2 pumps in one Right heart Right heart Receives and pumps deoxygenated bloodReceives and pumps deoxygenated blood Left heart Left heart Receives and pumps oxygenated bloodReceives 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 Inside layer  Myocardium Middle layer Middle layer Heart wallHeart wall  Epicardium Outside layer of heart Outside layer of heart Inside layer of the pericardiumInside 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) RBC’s (red blood cells) Contain hemoglobin Contain hemoglobin Carry O 2Carry O 2 Eliminate CO 2Eliminate CO 2 ‘transporters’‘transporters’  Thrombocytes Platelets Platelets Clot the bloodClot 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. To carry blood / blood cells to all the parts of the body.  3 main types Arteries Arteries Veins Veins Capillaries Capillaries

Artery  Largest blood vessel Carry blood away from the heart Carry blood away from the heart Spurt if cut Spurt if cut Can detect a pulse Can detect a pulse

Vein  Smaller than arteries Carry blood back to the heart. Carry blood back to the heart. Closer to skin Closer to skin Appear ‘bluish’Appear ‘bluish’ Do not spurt w/ cutDo not spurt w/ cut Cannot detect a pulseCannot detect a pulse

Capillary  Smallest of the vessels Microscopic Microscopic Connect arteries to the veins. Connect arteries to the veins. Gas exchange takes place Gas exchange takes place O 2O 2 CO 2CO 2

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?