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biology
chapter 4
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Cards (88)
What organ pumps blood around the body?
The
heart
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What type of tissue is the heart made from?
Cardiac muscle tissue
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What supplies the cardiac muscle tissue with oxygen?
Coronary artery
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Which chamber of the heart pumps blood to the lungs?
Right ventricle
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Which vessel brings oxygenated blood from the lungs to the heart?
Pulmonary vein
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Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
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Which chamber of the heart pumps blood around the body?
Left ventricle
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Which vessel takes deoxygenated blood to the lungs?
Pulmonary artery
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Which vessel brings deoxygenated blood into the heart?
Vena cava
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Which chamber of the heart receives deoxygenated blood from the body?
Right atrium
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Which vessel carries oxygenated blood around the body?
Aorta
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Where are the cells that control heart rate located?
Right atrium
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How do the cells in the right atrium control heart rate?
Generate
electrical impulses
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What is the function of the group of cells in the right atrium?
Acting as a
pacemaker
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What can be used to control irregular heartbeats?
Artificial pacemakers
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Which type of blood vessel carries blood away from the heart?
Artery
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Why do arteries have thick, muscular, and elastic walls?
To withstand
high pressure
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What is the lumen size of an artery?
Small
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Why do arteries have elastic walls?
So the walls can
stretch
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Which type of blood vessel carries blood to the heart?
Vein
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Why do veins have valves?
To stop
blood
flowing the wrong way
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What is the lumen size of a vein?
Large
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What is the structure of the walls of veins?
Thin walls
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Which type of blood vessel carries blood to tissues and cells?
Capillary
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Which type of blood vessel connects arteries and veins?
Capillary
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What is the thickness of a capillary wall?
One
cell
thick
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Why are capillary walls one cell thick?
Short
diffusion distance
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What is the lumen size of a capillary?
Very
narrow
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What type of circulatory system do humans have?
Double
circulatory system
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Why is the human circulatory system described as a double circulatory system?
Blood passes through the
heart
twice
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What happens to blood in the lungs?
Gas exchange
takes place
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What is blood?
A
tissue
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How many main components is blood made up of?
Four
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What is the function of red blood cells?
Bind to
oxygen
and transport it
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What is the function of plasma?
Transports
substances
and
blood cells
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What is the function of platelets?
Form
blood clots
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What is the purpose of blood clots?
Create barriers to
infections
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What is the function of white blood cells?
Defend the body against
pathogens
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What causes Coronary heart disease?
Build up of
fatty material
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What does the build up of fatty material do to the coronary arteries?
Making
them
narrow
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