Why not? It is like asking why are you born with hands and legs
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 substances flow from high concentration to low concentration through channels found in the cell membrane. Basically like a bridge.
Digestion is necessary because for energy from the food to be released and carried into the cells in our body the food must be broken down into soluble molecules for it to diffuse into the cells. Then energy is released during respiration.
The semi-permeable membrane in cells. Allows some substances to go through and not others.
Blood -> plasma -> extracellular fluid -> cells.
diffussion of oxyzen means dissociation curve .oxyzen diffussion depends on concentration of corbon dioxide concentration and bmr .if corbon dioxide concentration is increased the diffussion is also increased. if bmr is also high the diffussion of oxyzen in blood is also increase
veins
YES
Proteins are keep the cell going. They have many jobs to do one of which give the cell the energy to do what the cell is program to do in the body. So no proteins are not to large to diffuse in cells
protiens
Oxygen and carbon dioxide
Oxygen and carbon dioxide are substances that diffuse during respiration in living organisms. Oxygen diffuses into cells for cellular respiration, while carbon dioxide diffuses out of cells as a waste product.