Capillaries supply blood to your tissues. When the body is at rest, less energy is being used so the capillaries are not as engorged in comparison to exercise.
When one rests on harder surfaces, more pressure points occur that can close off capillaries and decrease blood flow. This can be amended with cushioning, or balanced by changing body position intermittently to allow easier circulation to these areas.
To the rest of the body. It exchanges the gasses and nutrients with the rest of the body at the capillaries.
the capillaries diffuse the digested food to every cell in the body
The arteries are blood vessels that carry blood away from the heart to the rest of the body. Arteries branch into smaller arterioles, which branch into capillaries. Capillaries are one-cell thick and have a diameter of about the width of one blood cell. Capillaries form into venules, which form into veins, which carry blood to the heart from the rest of the body. Click on related links for an illustration.
As blood flows through capillaries, it exchanges nutrients, wastes, and oxygen with body tissues. This transfer is accomplished via diffusion.
Oxygen moves into the lungs to the alveoli in the lungs into capillaries into pulmonary veins to the heart then to arteries that go through the rest of the body.
capillaries carry blood from the heart to the body
continuous capillaries
It entirely depends on what is in the nasal spray. If it is saline spray, then it doesn't really do anything to the capillaries per se. If it is a decongestant then it causes constriction of the capillaries (which will tend to open up the nasal airway). If it is H1N1 influenza spray, then it uses your capillaries to deliver virus to the rest of your body.
continuous capillaries
continuous capillaries
Unoxygenated blood travels to the heart though the veins to be pumped to your lung capillaries. At you lung capillaries the blood becomes oxygenated and then goes back to the heart to pump oxygenated blood to the rest of your body. the capillaries blood travels though you arteries.
Most "fresh supplies" are transferred into the rest of the body through the capillaries. Capillaries are grouped together in what are called Capillary Beds, where the high blood pressure of the arteries is slowed down (capillaries are very thin) to allow for optimum diffusion and transfer.