science core questions Flashcards
(15 cards)
What is the function of heart?
Pumps blood around the body
What is the heart made from?
Cardiac muscle
What type of circulatory system do humans have?
A double circulatory system
Where does the right ventricle pump blood to?
Lungs
Where does the left ventricle pump blood to?
Body Tissues
Name the three types of blood vessels.
Arteries, veins and capillaries
What blood vessel has the narrowest lumen and a one-cell thick wall?
Capillaries
What blood vessel has a thick muscular wall to withstand high pressure?
Arteries
What blood vessel has valves?
Veins
Why are there valves in veins?
Prevent backflow
Where does the aorta carry blood from and to?
From the left ventricle to the body tissues
Where does the vena cava carry blood from and to?
From the body tissues to the right atrium
Where does the pulmonary vein carry blood from and to?
From the lungs to the left atrium
What is the function of white blood cells?
Protect the body from infections
What is the function of red blood cells?
Carry oxygen around the body
