Heart Flashcards
Describe the flow of blood through the heart
Vena cava, right atrium, (valve) , right ventricles, pulmonary artery, lungs, pulmonary vein, left artery, (valve), left ventricle, aorta
Why is the left side of the heart heavier than the right side
More blood pressure of oxygenated blood requires thicker muscle, it needs more force to push blood around the body
What are valves for?
To stop blood flowing backwards
Why do humans have a double circulatory system?
To increase pressure around body which means more oxygen is in the body
What does the circulatory system consist of?
Heart
Blood vessel
Blood
What is the function of the circulatory system?
To transport oxygen and glucose around the body and remove waste products
Describe the flow of blood around the body
Blood goes to lungs where oxygen is added
Heart -> intestines where glucose is picked up
Glucose and oxygen is removed for respiration
Picks up waste products (co2 and water)
How is the structure of the arteries beneficial for its purpose?
Purpose: pump oxygenated blood around the body
Walls are thick + muscular due to high pressure
Lumen is small
Impermeable
How are the capillaries adapted for its function?
Small
Low pressure means thin walls
Exchanges substances with cells
Permeable thin
Small lumen
How are veins adapted for its function?
Large
Large lumen
Impermeable
Valves
Low pressure
Thin
How is a red blood cells large surface area good for its function?
Large surface area means it absorbs oxygen
What do white blood cells do?
Kill invading microorganisms
What do platelets do
Clot wounds
What is the plasma?
Liquid that carries cells
What is the purpose of the coronary artery
To supply its own source of blood to the heart so the heart can contract
