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Capillaries
In the lungs, in the alveolar capillaries
Capillaries pick up carbon dioxide from the cells of the body and deliver oxygen.
At the capillary level of our cardiovascular system tiny vessels pick up waste products from cells.
Capillaries surrounding cells pick up blood containing Water (dissolved in the plasma) and carbon dioxide (on the red blood cells) to bring it back through the veins and to the lungs. If I didn't answer your question or you want to ask more, post a message on my message board!
Blood picks up multiple things from cells. They pick up waste products like carbon dioxide and water, and they also pick up oxygen from the lungs.
They pick up oxygen
Arteries take blood from the heart to the cells of the body. Capillaries take the blood to the individual cells to give them food and oxygen. They then take Carbon Dioxide and waste away from the cells. Veins then take blood from the capillaries back to the heart. The Heart then sends blood through another artery to the lungs. It goes through different capillaries to get rid of Carbon Dioxide and pick up Oxygen. Then it goes through another vein back to the heart. From the heart, it goes back to the starting point.During the process, some of the blood going to the cells of the body goes through the kidneys to get rid of wastes. Some goes through the liver to get rid of different wastes and to pick up food from the intestines. Some goes to muscles. Some goes to the brain. Some feeds the heart so it can pump blood.veins,artery,capillaries.
In exchange, the blood picks up waste from the cells, including carbon dioxide, heat and excess water. The heart pumps blood throughout the body through a closed system of tubes. These tubes that carry the blood are called blood vessels. There are three types of blood vessels: arteries, veins, and capillaries. LESSON 1.1 -
Blood passes through capillaries as a means of either passing products to the cells or picking up things from the cells. The small intestine is where most digestion takes place so the capillaries pick up digested material to take to the liver via the portal system. The digested fat is picked up by the lymph capillaries, lacteals, which returns to the blood when the lymph connects to the right and left subclavians.
diffusion is when the materials go through the cell membrane between the capillaries (because capillaries are only one cell thick)
Capillaries are tiny thin-walled blood vessels that connect the smallest arteries and veins and allow the exchange of nutrients and waste between the blood and tissues. Oxygen and carbon dioxide are exchanged between the circulatory and respiratory systems; oxygen diffuses from the lungs into the bloodstream and is transported by erythrocytes (red blood cells) throughout the body. Carbon dioxide diffuses out of the blood into the alveoli and goes the reverse direction through the respiratory system and out the nose.