Topic 2 - Organisation Flashcards
Put these in order from larger to smaller: tissue, organ, cell, organism, organ system
Organism, organ system, organ, tissue, cell
What is an organism?
A group of organ systems working together.
What is a tissue?
A group of similar cells with a similar structure and function.
What is digestion?
Digestion is when large insoluble molecules are broken down into smaller soluble ones that can be absorbed into the blood stream.
What is bile for?
it emulsifies fat to form small droplets, and neutralises stomach acid.
Where is bile made and then stored?
- the liver
- then the gall bladder
Where does the right ventricle pump blood?
It pumps blood to the lungs
Where does the left ventricle pump blood?
It pumps blood around the body.
What do the coronary arteries do?
Supply oxygenated blood to the heart muscle
Where is the pacemaker?
In the right atrium.
What are the properties of arteries?
- Carry blood away from heart
- Thick muscular tissue for walls.
- Small lumen
- Carry blood under high pressure
What are the properties of veins?
- Carry blood to the heart
- Thin walls
- Large lumen
- Carry blood under low pressure
- Have valves
What are the properties of capillaries?
- Connects arteries and veins
- Once cell thick
- Carry blood under very low pressure
What is blood made up of?
- Plasma 55%
- Red blood cells 45%
- White blood cells<1%
- Platelets<1%
What is plasma, and what does it transport?
- It is a pale yellow fluid part of the blood
- Carries CO2, water, hormones and waste.