Anura Posted January 13, 2011 Share Posted January 13, 2011 I read that veins and arteries are supplied by other veins or ateries with blood. Im guessing. But how are those suppplied? Link to comment Share on other sites More sharing options...
ewmon Posted January 13, 2011 Share Posted January 13, 2011 Could you re-state your OP with more detail? Link to comment Share on other sites More sharing options...
SMF Posted January 13, 2011 Share Posted January 13, 2011 (edited) Ones heart pumps blood into arteries. The arteries branch and branch until they are small (arterioles). The blood flows from arterioles into a capillary bed. Capillaries are a very small vein and are where gasses (oxygen and carbon dioxide), nutrients, and waste products are exchanged between cells and the blood. Blood collected from capillary beds combine in larger and larger veins to return the blood to the heart to be pumped again. The heart is two separate pumps. One half pumps blood through the capillary beds in lung tissue to exchange gasses and oxygenate the blood, while the other half of the heart pumps oxygenated blood through the rest of the body. So Heart--> arteries --> capillaries --> veins --> heart. SM Edited January 13, 2011 by SMF Link to comment Share on other sites More sharing options...
alpha2cen Posted January 13, 2011 Share Posted January 13, 2011 Ones heart pumps blood into arteries. The arteries branch and branch until they are small (arterioles). The blood flows from arterioles into a capillary bed. Capillaries are a very small vein and are where gasses (oxygen and carbon dioxide), nutrients, and waste products are exchanged between cells and the blood. Blood collected from capillary beds combine in larger and larger veins to return the blood to the heart to be pumped again. The heart is two separate pumps. One half pumps blood through the capillary beds in lung tissue to exchange gasses and oxygenate the blood, while the other half of the heart pumps oxygenated blood through the rest of the body. So Heart--> arteries --> capillaries --> veins --> heart. SM Can we measure the blood output velocity of the aorta to the body? We can calculate the blood velocity by using this equation. (heart ratio) x (the amount of output blood per pulse) The problem is measuring the amount of output blood per one pulse exactly. Link to comment Share on other sites More sharing options...
dragonstar57 Posted January 13, 2011 Share Posted January 13, 2011 do the cells of the lung get there o2 directly from the air? Link to comment Share on other sites More sharing options...
Anura Posted January 13, 2011 Author Share Posted January 13, 2011 Ones heart pumps blood into arteries. The arteries branch and branch until they are small (arterioles). The blood flows from arterioles into a capillary bed. Capillaries are a very small vein and are where gasses (oxygen and carbon dioxide), nutrients, and waste products are exchanged between cells and the blood. Blood collected from capillary beds combine in larger and larger veins to return the blood to the heart to be pumped again. The heart is two separate pumps. One half pumps blood through the capillary beds in lung tissue to exchange gasses and oxygenate the blood, while the other half of the heart pumps oxygenated blood through the rest of the body. So Heart--> arteries --> capillaries --> veins --> heart. SM I am aware of all of that. I'll say what the book im reading says and then rephrase my question. Blood vessels are composed of living tissue, so they require nourishment. They are nourished by vessels called vasa vasorum. My question is, what supplies the vasa vasorum? 1 Link to comment Share on other sites More sharing options...
ewmon Posted January 13, 2011 Share Posted January 13, 2011 Check Wikipedia. Link to comment Share on other sites More sharing options...
Anura Posted January 13, 2011 Author Share Posted January 13, 2011 (edited) does noone not know? Edited January 13, 2011 by Anura Link to comment Share on other sites More sharing options...
ewmon Posted January 14, 2011 Share Posted January 14, 2011 Find your answer in Wikipedia under vasa vasorum. Link to comment Share on other sites More sharing options...
SMF Posted January 14, 2011 Share Posted January 14, 2011 Anura, I am sorry, but your question was a bit vague. Vasa vasora mostly arise as small branches from the artery that is being supplied. This is required, for arteries (mostly), because the many smooth muscle and elastin layers in the media layer of arteries are designed to contain blood, and this blocks diffusion. Also, a component of capillary beds (not the ones in the lungs) is that they are leaky so that some proteins, immune molecules, and immune cells can gain access to all of the cells in the body. Vasa vasora for the wall structure of some large veins originate from the accompanying artery. Arteries and veins that are connected at their terminus by a capillary bed usually travel together side by side. SM Dragonstar57, yes the cells in the walls of alveoli get their O2 directly because the blood entering the lung alveolar capillary beds is deoxygenated. Lung tissue is pretty amazing. On the other hand the walls of bronchi and bronchioles, connective tissue, and large arteries and veins in the lung that present a much larger diffusion distance to the living cells and therefore require a separate blood supply that enters the lung separately. SM 2 Link to comment Share on other sites More sharing options...
Anura Posted January 14, 2011 Author Share Posted January 14, 2011 Anura, I am sorry, but your question was a bit vague. Vasa vasora mostly arise as small branches from the artery that is being supplied. This is required, for arteries (mostly), because the many smooth muscle and elastin layers in the media layer of arteries are designed to contain blood, and this blocks diffusion. Also, a component of capillary beds (not the ones in the lungs) is that they are leaky so that some proteins, immune molecules, and immune cells can gain access to all of the cells in the body. Vasa vasora for the wall structure of some large veins originate from the accompanying artery. Arteries and veins that are connected at their terminus by a capillary bed usually travel together side by side. SM Dragonstar57, yes the cells in the walls of alveoli get their O2 directly because the blood entering the lung alveolar capillary beds is deoxygenated. Lung tissue is pretty amazing. On the other hand the walls of bronchi and bronchioles, connective tissue, and large arteries and veins in the lung that present a much larger diffusion distance to the living cells and therefore require a separate blood supply that enters the lung separately. SM Thanks Link to comment Share on other sites More sharing options...
dragonstar57 Posted January 15, 2011 Share Posted January 15, 2011 Dragonstar57, yes the cells in the walls of alveoli get their O2 directly because the blood entering the lung alveolar capillary beds is deoxygenated. Lung tissue is pretty amazing. On the other hand the walls of bronchi and bronchioles, connective tissue, and large arteries and veins in the lung that present a much larger diffusion distance to the living cells and therefore require a separate blood supply that enters the lung separately. SM thankyou Link to comment Share on other sites More sharing options...
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