Principles of Circulation Flashcards
What is the transport system
Heart, circulatory system and the fluid that flows through it
What are the features of mass transport system
A system of vessels that carry substances
A way making sure that substances are moved in the right direction
A suitable transport medium
A means of moving materials fast enough to supply the needs of the organism
What is a single circulatory system
circulation in which the heart pumps the blood to the organs of gas exchange and the blood then travels on around the body before returning to the heart
What is systemic circulation
carries OB from the heart to the cells of the body where the oxygen is used and carries DOB back to the heart
What is pulmonary circulation
carries de oxygenated blood to the lungs and oxygenated blood back to the heart
What is a benefit for the double circulatory system 1/2
allow for higher metabolic rates to be maintained as there is no mixing of oxygenated and deoxygenated blood. This means that blood leaving the heart to travel to the body is rich in oxygen
What is a benefit for the double circulatory system 2/2
The full oxygenated blood can be delivered quickly to the body tissues at high pressure
What is the double CS
circulation that involves two CS
- one DB flowing from the heart to the GE organs and back oxygenated to the heart
- OB leaving the heart and flowing around the body returning DO to the heart
Why must a organism need a mass transport system?
- Diffusion is not enough
- Removal of waste
- Delivering oxygen and nutrients so that cell can carry out their functions
Compare and contrast single and double circulatory systems.
Similarties:
Contains a fluid medium
Differences:
blood passes {through the heart} once per circulation, double
circulation blood passes {through the heart} twice
oxygenated and deoxygenated blood not separated, double
circulation they are separated
