8 Transport In Animals Flashcards
What organisms are open-ended circulatory systems mainly found in?
Invertebrate animals- including most insects and molluscs.
What animals are single closed circulatory systems found in?
E.g. fish and annelid worms.
What animals have a double closed circulatory system?
Birds and most mammals.
Pros of double circulatory system?
High blood pressure and fast flow of blood.
Heart can pump blood further around body.
Pros and cons of single closed circulatory system?
Pros- less complex, doesn’t require complex organs.
Cons- low blood pressure, slow movement of blood, activity level of animal tends to be low.
What is oncotic pressure?
The tendency of water to move into blood by osmosis.
What is hydrostatic pressure?
The pressure blood is under due to the surge of blood that occurs every time the heart contracts.
What is the oncotic pressure of blood?
-3.3kPa
How are capillary walls permeable?
Due to the gaps between the cells.
What is the septum?
The inner dividing wall of the heart which prevents the mixing of deoxygenated blood and oxygenated blood.
Cardiac output=
Heart rate x stroke volume
