Blood Test Flashcards
What are organs
Organs are made of tissues. One organ may contain several tissues
What are tissues
A group of cells with similar structure and function
What are systems
Systems are groups of organs that perform a particular function
3 details about a vein
Large lumen
Relatively thin walls
Often have valves
3 details about an artery
Small lumen
Thick layer of muscle and elastic fibres
Thick walls
2 details about a capillary
Tiny vessel with narrow lumen
Walls single layer thick
What does the pulmonary artery have to stop the blood flowing the wrong way?
A valve that only lets blood flow out instead of back to the heart as it closes up if this happens
Where does the blood come from
Vena Cava
What does the red blood cell carry(2 things)
Haemoglobin
Oxygen
How is the red blood cell suited for its job
No nucleus-more space
Large surface area-dip in middle
Where is carbon dioxide in the blood
Plasma
Where are the white blood cells
Blood
Lungs
What do white blood cells do
Destroy pathogens
How are white blood cells best suited for their job
Make antibodies and antitoxins and ingest
What does plasma do
Carries everything in blood
