Cell Organisation And The Circulatory System Flashcards
What are cells:
Make up tissues, organs and systems
What do cells do:
Differentiate and become specialised.
These specialised cells form tissues, which form organs, which form organ systems.
Tissues:
A tissue is a group of similar cells that work together to carry out a particular function
Organs:
An organ is a group of different tissues that work together to perform a particular function
Organ systems:
An organ system is a group of organs working together to perform a particular function
The heart:
Part of the circulatory system
The heart has:
Four chambers and four major blood vessels
What does the right atrium of the heart receive:
Deoxygenated blood from the body through the vena cava
Where does the deoxygenated blood move:
Moves through the right ventricle which pumps it to the lungs via the pulmonary artery
What does the left atrium receive:
Oxygenated blood from the lungs through the pulmonary vein
Oxygenated blood then moves:
Through to the left ventricle, which pumps it out round the whole body via the aorta
Left ventricle:
Much thicker wall than the right ventricle as it needs more muscle because it has to pump blood around the whole body,where as the right ventricle only has to pump it to the lungs.
Valves:
Prevent the backflip of blood
Stroke volume:
The amount of blood pumped out of left ventricle per beat
Cardiac output:
The amount of blood that leaves the ventricle per minute
