forgive my spelling i'm lazy

[Mulan]

Ok, so basically
Arteries:(always heart to body)
pulmonary -  carries deoxygenated blood from heart to lungs
systemic- carries oxygenated blood from heart to cells

Veins:(body to heart)
pulmonary-carries oxygenated blood from lungs to heart
systemic- carries deoxygenated blood from cells to heart

and wat do capillaries do? if blood cells are squeezing thorugh them then wats teh point of arteries & veins for transportation of blood. wats the difference?
me confused

btw wats GIT stand for

[Russ]

GIT is just shorthand for gastrointestinal tract.

Capillaries facilitate gas exchange. So arteries carry the blood to the target tissue but the arteries are big. So one single artery would have the blood flowing through it quickly and there wouldn't be much opportunity for O2/CO2 exchange. The capillaries branch off and provide a huge surface area, which means that it's much easier/faster for products to be exchanged. Same way that surface area affects rates of reaction in chemistry.

[shinny]

The blood doesn't transfer from the arteries to the tissues. It can't really get through them because the walls of the arteries are so thick. Instead, arteries transport blood to capillaries which then transfer the blood into tissues. You could think of arteries as the lead plumbing pipes underground which then lead to capillaries which are like sprinklers sprinkling water onto the lawn to provide it the nutrition it needs. Except in this case, it's more of a shower of fresh blood onto a lawn bed of human flesh.

...I swear I'm not crazy.

[Mulan]

haha ok. thanks guys for explaining.
more karma coming your way

GIT is just shorthand for gastrointestinal tract.

So it's also another word for the digestive system?

[shinny]

haha ok. thanks guys for explaining.
more karma coming your way

GIT is just shorthand for gastrointestinal tract.

So it's also another word for the digestive system?

Yep, pretty much.

[Russ]

Except in this case, it's more of a shower of fresh blood onto a lawn bed of human flesh.

...I swear I'm not crazy.

Just quoting this for posterity