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What does the circulatory system transport?
Respiratory gases, nutrients, waste products, hormones, antibodies, salts and heat
Why is the transportation of heat important?
To maintain body temperature in Endothermic animals and transfter heart when obtained in Ectothermic animal
How is heat transfered in the blood?
Arteries and veins run parallel to each other So heat from the arteries (coming from the core) is transferred over to the veins.
What are the three components of the circulatory system?
1) Circulating fluid
2) A propulisve organ
3) Vascular system (vessels, capilaries ext)
Does an open system have high or low blood pressure & blood flow?
Low blood pressure and blood flow
Does a closed system or open system have a slower return of blood to the heart?
The open system has a slower return of blood to the heart
Which system (open or closed) includes invertebrates?
Both systems do
Which system (open or closed) includes vertebrates?
Only the closed system
Which system (open or closed) has a direct exchange between blood and tissues?
The open system
Does the open system have an incomplete or enclosed system of vessels?
Incomplete system of vessles
Does the closed system have an incomplete or enclosed system of vessels?
Enclosed system of vessles
Does a closed system have high or low blood pressure and blood flow?
High blood pressure and blood flow
Which system (open or closed) has a blood tissue exchance across the capilary wall
What are the 3 main advantages of a closed system?
1) Control of the velocity and distribution of blood flow
2) Allows increases in metabolic rate & body mass
3) Lead to the evolution of the complex kidney
What is are advantages of a divided system?
1) Higher blood pressure to body
2) increased metabolic reate
3) increased body mass
An undivided system has little/no separation between?
The systemic and pulmonary circuits
What are the 3 evolutionary trends from (water breathing) to (air breathing)
1) increased oxygen uptake
2) higher blood flow and pressure
3) more seperation between oxygenated and deoxygenated blood
What are the 4 chambers of the fish heart (in order of blood flow)
Bulbus Arteriosis or Conus Arteriosis
A shark has a conus arteriosis or a bulbus arteriosis?
What aids in the serperation of oxygenated and deoxygenated blood in air breathing lungfishes
1) Division of the heart is more complete
2) Partial septum dividing the atrium and ventricle
3) Spiral folds in the bulbus cordis