B2.2 The Circulatory System Flashcards
What do red blood cells do?
Carry oxygen
What do lymphocytes do?
Make antibodies
What do phagocytes do?
Digest microbes
What convert fibrogen to fibrin to form a mesh to trap blood which causes scab formation?
Platelets
Define double circulation.
When blood is pumped through the heart twice in one complete cycle.
How does blood move through the body?
It’s pumped through the right side of the heart to the lungs and then returned to the left side of the heart before being pumped around the body.
What type of blood does the right ventricle and atrium contain?
Deoxygenated
What type of blood does the left atrium and ventricle contain?
oxygenated blood
What will happen to the heart rate in an unfit person during exercise?
It increases faster
What happens to the peak of the heart rate during exercise in an unfit person?
It reachers a higher peak
In an unfit person, will it take longer or shorter for their heart rate to return to rest after exercise?
Longer
Describe the thickness of the vessel wall in the artery
Thick
Describe the thickness of the vessel wall in the viens
Relatively thin
Describe the thickness of the vessel wall in the capillary
One cell thick
Describe the diameter of the lumen in the artery
Relatively small