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HELUS: Life Science: Cardiopulmonary System

Breathing is the process of air entering and ___ our lungs. exiting
___ is breathing in air. Inhalation
___ is breathing out air. Exhalation
Air moves through the nose or mouth through the ___, larynx, and trachea into the___. pharynx, bronchi
Gas exchange occurs in the ___. lungs
Air ___ the lungs through the bronchi enters
Air is carried through branched ducts called ___, which end in tiny sacs. bronchioles
Oxygen passes over a membrane between the ___ and small blood vessels. alveoli
Pneumonia, suffocation, and ___ make it difficult to breathe. asthma
Thick fluid can build up in the lungs of a person with ___. pneumonia
___ occurs when your lungs and body do not receive enough oxygen. Suffocation
Asthma interferes with gas exchange by causing ___ of the airways. swelling
Blood is about 55 percent ___, which is about 90 percent water. plasma
White blood cells, ___ ___ ___, and platelets make up the remaining portion of blood. red blood cells
Without ___ you could die from even a small cut because your blood would not clot. platelets
White blood cells are part of the ___ ___ and fight infections. immune system
Red blood cells have a protein called ___ that carries oxygen. hemoglobin
You can donate blood because your body constantly ___ blood cells. replaces
The heart is the organ that ___ blood throughout the circulatory system. pumps
The two upper chambers of the heart that receive blood are the ___. atria
The ___ are the two lower chambers of the heart. ventricles
___ are vessels that carry oxygenated blood away from the heart to organs in the body. Arteries
Smaller vessels called ___ deliver oxygen and nutrients. capillaries
Blood vessels that carry deoxygenated blood to the heart are called ___. veins
Diseases of the heart and blood are called ___ ___. cardiovascular diseases
A ___ ___ occurs if the coronary arteries cannot supply enough blood to the heart. heart attack
A blocked or ruptured blood vessel leading to the brain can cause a ___. stroke
The ___ ___ oxygenates the blood. pulmonary system
The ___ ___ then delivers oxygenated blood to the tissues of the body. circulatory system
A ___ lifestyle is the best way to reduce your risk of stroke and heart attack. healthy
Exercise helps improve the ___ of blood and oxygen to your body and keeps your bloodvessels flexible. flow
Choosing not to ___ keeps your blood vessels from hardening prematurely. smoke
Eating a diet low in saturated fat and ___ prevents materials from building up on blood vessel walls. cholesterol
Pressure is the amount of ___ per unit area. force
A ___ is the SI unit for pressure. pascal
In the circulatory system, ___ enables blood vessels to transport blood to all tissues. pressure
Pressure is increased by increasing the amount of force applied to a ___ area. constant
Pressure is also increased by decreasing the ___ of the area to which a constant force isapplied. size
Pressure can be ___ by applying less force, or by spreading a force over a ___ area. decreased, larger
Mammals, including humans, use breathing to ___ air into their lungs. pull
When you inhale, the diaphragm and rib muscles cause the chest cavity to ___. expand
The ___ of the lungs is expanded, and the pressure in the alveoli decreases. volume
Air moves from areas of high to low ___, so air is pulled into the lungs. pressure
When you exhale, the ___ contracts. chest
The volume of the lungs ___ and forces the air out of the lungs. decreases
When the ___ contracts, the volume inside the chamber decreases. heart
Blood is forced out of the chamber as the chamber gets ___. smaller
The heart and veins have ___ that keep blood flowing in one direction. valves
Valves act like ___ that open in only one direction. doors
Valves in the ___ prevent backflow. veins
The ___ ___ contracts and pumps blood into the right ventricle. right atrium
The ___ ___ pumps blood out of the heart to the lungs. right ventricle
Blood leaves the lungs and returns to the ___ ___. left atrium
Blood passes from the left atrium to the ___ ___. left ventricle
The left ventricle pumps blood out of the heart to all the ___ of the body. tissues
Changes in pressure can lead to ___-___ problems. life-threatening
___ is a dangerous rise in blood pressure caused by blockages in or hardening of blood vessels. Hypertension
Hypertension is a disease caused by genetic, environmental, and ___ factors. dietary
___ can occur when a large amount of blood is lost, decreasing blood pressure. Shock
Created by: jnosik