Cardiac confusion

[surya]

Do the cardiac muscles utilise the blood passing through them,either oxygenated or deoxygenated?I know that blood it supplied to the cardiac muscles by the coronary arteries,but wont atleast some blood diffuse into the muscle cells?
Can anyone please explain whether it actually happens or not and if not why?

[baikuza]

have hear vasa vasorum? please find the article about this. good luck. hehe...

[MrMistery]

It does happen, but only in frogs and reptiles..

[baikuza]

it also happen in human... you know the arteria is pretty thick and it would need nutriens also. so you can find vasa vasorum in cor also.


try this
http://www.med.uiuc.edu/histo/small/atl ... c/40a6.htm
http://www.med.uiuc.edu/histo/small/atl ... c/10a2.htm

cor also pretty thick, so i think we can find vasa vasorum in it, also

[MrMistery]

That is a different thing. Things do not diffuse from the inside of the artery or vein directly to it's cells. each artery or vein has it's own capilaries(your vasa vasorum) or if they are really really small they get their nutrients from the intercellular fluid..

[baikuza]

wait. different thing? i do not get it.
you are right if you said it is not directly through into the cells. it will pass capillaries and intertitial-the matrix-first to allow cell get its nutrient.

yes. they transfer the nutrients by diffusion. just the same way that happen in epidermis.. the upper/the more far from membrana basalis the more they reduced in thickness--become thinner--, the more near the cells from membrana basalis the more increasing in thickness-"thicker"-

i think you were get it. but i do not understand the reason why you said different thing.

[surya]

it still isn't clear to me.the only thing that i'm sure of now is that vasa vasorum means cappillaries

[anthesis06]

the heart musles do not directly utilize the blood entering the atria
intead the coronary artery supplies blood to the heart wall and dthe musle tissue

[surya]

i know that, but y so if there is more oxygen or carbondioxide content in the blood passing through heart than the blood in the heart muscles,why is there no exchange takin place?

[baikuza]

hei, do not forget that the diffusion/exchange in our blood, in this case, is depend on the thickness of the membrane.

some thing can do diffusion only if the membrane is thin enough (cor is not in this case), the membrane is got enough moisture in order to make it work-just like in the frog skin-, and there is gradien (one side is lack of this, and another is rich with it).

cor is thick-the membrane and the tissue-.
even you can say that cor is have the moisture, but the thickness is not allow the transport.
gradien. even so, it will not allowed by the thick-thing is cor.


vasa vasorum is not cappilaries. cappilaries is not inside either vein and artery. vasa vasorum is like the network inside the artery and vein(thick vein). it allow blood go inside the artery and vein, like a small branch of artery..

if you still confused, send a replay again.

[surya]

i hav never heard of t vasa vasorum then.ya,i get what u say abt the diffusion not occuring.Thanx a lot.
If u know a link or something explaining abt the vasa vasorum,plz share it with me.Thanx again




-Surya

[baikuza]

you are wellcome. (^ ^)

hm, i think there are a lot of it in internet. try any search engine like google or some others. good luck