7 cv system Flashcards
Why do we need a transport system?
In order for organisms to be able to absorb and remove required substances.
how is Carbon dioxide produced?
Produced as a by-product of cellular aerobic respiration, when oxygen is used to release energy from fuels
How is Urea produced?
A nitrogenous waste product produced by cellular metabolism and protein turnover
How is lactate acid produced?
Produced as a result of anaerobic respiration where cells respire without oxygen
achey muscles
Single celled organisms
Nutrients can move in and out by diffusion alone
Exchange systems not needed
Large celled organisms
nutrients Cant move in and out by diffusion alone
Exchange systems needed
What does the blood transport
Nutrients and substrates
Waste and products
Heat
What does the blood regulate
Temp
Blood volume
Water potential
Function of circulatory system
Transport of respiratory gases
Transport of metabolites
Why is the circulatory system a closed system
Confined to blood vessels
Advantage of a closed circulatory system
High bp maintained
Why is the circulatory system a double system?
Blood is pumped twice in one circulation
Features of artery and veins
Elastic tissue
Smooth muscle
Endothelium
Tissue fluid
Plasma - Large blood proteins
Arteries
Carry oxygenated blood from the heart to the body
