Types Of Transport Systems Flashcards
Two substances that are waste products
Carbon dioxide
Nitrogenous waste
Two substances that essential
Oxygen and water
List factors affecting the need for a transport system
Size
SA:V
Level of activity
How does SA:V affect the need for a TS
As an organism increases in size, it’s SA:V decreases, when it gets to a certain point the need for a specialised ES and TS becomes essential
How does level of activity affect the need for a TS
The more activity, the increased demand for O2 and nutrients, these are release from respiration and requires energy. Also the need to maintain homeostasis requiring energy
How does size affect the need for a TS
Larger sizes mean that diffusion isn’t enough as the diffused substances travel at a SLOWER rate, and dobt reach the deeper parts
3 things of a good TS
Pump, vessels and fluid to transport materials
Good exchange surface to load substances into TS and remove waste
Adaptable- cope with changes in demand
What’s a single CS
Blood goes through heart OnCE in cycle around body
What’s w double CS
Blood flows to heart twice in one cycle
Describe the CS of a fish
It’s a single CS blood pumped from heart to gills
Picks up oxygen
As it travels through gill capillaries, it loses pressure
Pumped at a lower pressure and slower rate
Describe the CS of a mammal
Heart connects the PC abd SC
PC shorter distance so lower pressure than SC
Blood from PC is pushed by LA into aorta higher pressure faster rate
What’s an open circulatory system in an insect
Blood isn’t contained in vessels
Pumped from heart
Fills body cavity called haemocel
Blood is pushed by body muscles or some insects have a diesel (open ended tube) pushes blood by peristalsis
What don’t insect transport in their CS
Oxygen
