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Circ & Resp Systems
Circulatory and Respiratory Systems
| Term | Definition |
|---|---|
| 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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