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Circ & Resp Systems

Circulatory and Respiratory Systems

TermDefinition
Circulatory System Transports materials to and from cells
Blood Made of plasma, red blood cells, white blood cells, and platelets
Plasma Around 55% of your blood, it is the liquid portion
Red blood cells The part of blood that carries oxygen to the body
White blood cells The part of the blood that fights infection and disease
Platelets The part of the blood that helps with clotting
Heart the major muscle of the circulatory system
Valves Regulate blood flow, help control blood direction
Arteries Strong, muscular blood vessels that carry blood away from the heart
Veins Carry blood back to the heart
Capillaries Tiny blood vessels with thin walls that help with gaseous and nutrient exchange
Respiratory System Provides the body with a fresh supply of oxygen for cellular respiration and removes carbon dioxide (waste product)
Nasal cavity The internal entry and exit point for air
Pharynx Serves as a passageway for both air and food at the back of the throat
Larynx Passes air over your vocal cords so you can speak
Trachea What connects your pharynx to your lungs
Epiglottis A piece of skin that covers the trachea when you swallow, preventing food from entering
Bronchi The two large passageways that lead from the trachea to your lungs
Bronchioles The bronchi are further subdivided into these. Alveoli are found on their ends
Alveoli Tiny sacks with thin membranes surrounded by capillaries, where gaseous exchange occurs
Lungs The organ(s) that contain alveoli, bronchi and connective tissue
Diaphragm The muscle that helps you breath
Chambers of the heart Right atrium, right ventricle, left ventricle, left atrium
Right atrium and right ventricle Blood flows from the body to here. They are low in oxygen, but high in carbon dioxide
Left atrium and left ventricle Blood flows from the lungs here. They are high in oxygen and low in carbon dioxide
Right atrium De-oxygenated blood is returned here by two large veins, the superior vena cava and the inferior vena cava
Right ventricle When the right atrium contracts, blood is pushed through the tricuspid valve to here
Left atrium Oxygenated blood travels here via the pulmonary vein
Left ventricle Oxygenated blood is pumped here and then out of the heart through the aorta.
Created by: Marquart
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