The Circulatory System Flashcards
What is the liquid part of blood called?
Plasma
What is blood made up of?
Platelets
Red blood cells
White blood cells
Plasma
What is the function of plasma?
To transport substances and heat
What is the function of red blood cells?
To transport oxygen
What is the function of white blood cells?
Fight disease
What is the function of platelets?
To clot blood
Name the three blood vessels
Capillaries
Arteries
Veins
What is the structure of veins?
➖Thin wall, large lumen ➖Blood doesn't flow under pressure ➖Has valves ➖Carries blood to the heart ➖Usually contains oxygen poor blood
What is the structure of arteries?
➖Thick wall, small lumen ➖Under high pressure ➖No valves ➖Carries blood away from the heart ➖Usually contains oxygen rich blood
What is the structure of capillaries?
➖Thin wall, tiny lumen
➖Blood flows under low pressure
➖no valves
➖Connects arteries and veins
What is the function of the heart?
To pump blood around the body
What is the function of the aorta?
It carries oxygenated blood from the left side of the heart to the main organs
What is the function of the pulmonary vein?
To carry oxygenated blood from the lungs to the left side of the heart
What is the function of the pulmonary artery?
It carries deoxygenated blood to the lungs from the right side of the heart
What is the function of the vena cava?
It carries deoxygenated blood from the organs to the right side of the heart?
What are the four chambers of the heart?
The: Right atrium Left atrium Right ventricle Left ventricle
Which side of the heart has a thicker wall and why?
The left because it has to pump blood around the body
What do valves prevent?
The backflip of blood
What if the wall that divides the left side and the right side of the heart?
The septum
What is the average persons pulse rate?
70
What are the functions of blood?
Transport
Defence against disease
Keeping body temperature constant
What is double circulation?
The heart is pumping blood to the lungs and around the body at the same time.
