alveoli
Lungs: Oxygen and carbon dioxide diffuse across the alveolar walls in the lungs during respiration. Small Intestine: Nutrients like glucose and amino acids diffuse from the intestinal lumen into the bloodstream for absorption. Kidneys: Waste products and excess ions are diffused out of the blood and into the nephrons for excretion in the urine.
The three main substances that diffuse into cells from capillaries are oxygen, carbon dioxide, and nutrients like glucose. Oxygen is essential for cellular respiration, carbon dioxide is a waste product that needs to be removed, and glucose provides energy for cellular processes.
Animals without blood, such as sea sponges, obtain oxygen and nutrients through diffusion. They rely on their porous body structures to allow oxygen and food particles to diffuse in and waste products to diffuse out. This process occurs through direct contact with their environment.
Substances move down their concentration gradient. By that I mean where they move from an area of high concentration to an area of low concentration. This is essentially diffusion. Nutrients like glucose or oxygen that are high in the blood but low in the tissues, diffuse from the blood into the tissues. Wastes like carbon dioxide which are high in the tissues but low in the blood, diffuse from the tissues into the blood.
The molecules of food and oxygen diffuse into cells. oh and btfw co2 and waste chemicals diffuse ut of cells. im in year 3
The walls of capillaries are very thin allowing the nutrients of cells to diffuse through them. They facilitate the diffusion of nutrients to the body by passing them through their cell walls.
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.
Wastes and nutrients are carried in the blood and diffuse across the capillary walls.
Blood -> plasma -> extracellular fluid -> cells.
They are only one cell thick and have very thin walls, to allow nutrients and oxygen to diffuse out of them.
No, the trachea is a passageway for air to travel to and from the lungs. Oxygen and carbon dioxide are exchanged in the alveoli of the lungs, where they diffuse across the walls of the alveoli and capillaries.
This process occurs through the capillaries. Nutrients and oxygen diffuse from the blood into the tissues, while waste products and carbon dioxide diffuse from the tissues into the blood. This exchange is facilitated by the thin walls of the capillaries and the high surface area for diffusion.
Capillaries
The substances flow from high concentration to low concentration through channels found in the cell membrane. Basically like a bridge.
Capillaries have thin walls to optimise the level of diffusion of oxygen and other nutrients in the blood stream to the surrounding cells.
the lungs causes oxygen from the water to diffuse into the blood
If their walls are too thick, substances like oxygen and nutrients and waste cannot pass across the cells into or out of the body.