The semi-permeable membrane in cells. Allows some substances to go through and not others.
Blood -> plasma -> extracellular fluid -> cells.
Oxygen and carbon dioxide
Capillaries deliver essential substances to the cells of the body, including oxygen, nutrients (such as glucose and amino acids), and hormones. These substances diffuse from the blood in the capillaries into the surrounding tissues, allowing cells to perform vital functions. Additionally, capillaries help remove waste products, like carbon dioxide and urea, from the cells and transport them back to the bloodstream for excretion.
Diffusion occurs throughout the human body, and without it, cells and body tissue, dirty atmosphere, oxygen concentration may be low, and the eye can dry out.
Oxygen and nutrients diffuse across the walls of capillaries in the bloodstream into tissues and cells in the body. This allows for the delivery of essential molecules to support cellular function and metabolism.
Capillaries take oxygen and nutrients from the blood to the cells in the body. They also remove waste products, such as carbon dioxide, from the cells.
oxygen and glucose
Inhaled oxygen diffuses through the walls of the alveoli in the lungs, then into the bloodstream where it binds to hemoglobin in red blood cells for transportation to tissues and cells in the body.
isn't it salty fluid...
At the level of the capillaries, oxygen will diffuse out of the saturated red blood cells down their concentration gradient into the tissues where their concentration is lowest.
Inhaled oxygen will diffuse through the walls of the lungs. It will also diffuse through the walls of red blood cells so it can be carried all over the body.
Blood does. It carries oxygen from the lungs with which you breath fresh air in. Then blood goes to the heart and is sent to the whole body with oxygen! Oxygen support the cells', and the body's life!