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Purpose of System
Transportation (Oxygen, Heat, Urea, Nutrients, Carbon Dioxide, Hormones)
Regulates internal temp (heat transportation)
protects against blood loss (injury, disease-causing microbes)
Main components of System
Heart: Muscular organ, continuously pumps blood through body and generates blood flow
Blood Vessels: System of hollow tubes through which blood moves
Blood: Fluid that transports materials like oxygen, carbon dioxide and nutrients
Chambers: Atria
On top!
Right Atrium: Recieves deoxygenated blood from body via superieur or inferior vena cava
Left Atrium: Recieves oxygenated blood from lungs via pulmonary veins
Chambers: Ventricles
On bottom
Right Ventricle: Recieves deoxygenated blood from right atrium, pumps it to pulmonary artery, which takes it to lungs to get oxygen
Left Ventricle: Recieves oxygenated blood from left atrium, pumps it to aorta, which carries it to body
Septum
Separates left and right chambers of the heart
Vessels of the Heart: Arteries VS Capillaries VS Veins
Arteries = Carry high blood pressure from heart to tissues. Have thicker muscular layer and tend to be large structures
Capillaries = Blood moves slowly through them so substances (nutrients, oxygen, carbon dioxide) can be exchanged. Very small, can penetrate almost any tissue
Veins = Carry low blood pressure back to heart using valves. Thinner than arteries, tend to be large structures
Arteries
Pulmonary Artery = Deoxygenated blood carried to lungs
Aorta = Oxygenated blood carried AWAY from heart to rest of body
Veins
Superior Vena Cava = carries deoxygenated blood from top of body to heart (R atrium)
Inferior Vena Cava = carries deoxygenated blood from bottom of body to heart (R atrium)
Pulmonary Vein = Carries oxygenated blood from lungs to L atrium
Valves
Prevent back flow of blood
Coronary Arteries
Branches of aorta through the heart muscle, that provide oxygen and nutrients to heart muscle cells
Bc blood passing through heart do this
Diagram
(13)
Heart
slightly to left middle of chest
size of fist
composed of cardiac muscle
contract and relaxes rhythmically/involuntarily
Components of blood
plasma - dissolves/carries all other components of blood, nutrients, waste
red blood cells - transport oxygen
whit blood cells - protect against pathogens
blood clotting following damage
