* Digestion: This process breaks down large food molecules (like carbohydrates, proteins, and fats) into smaller, simpler molecules that the body can absorb.
* Absorption: This is where these smaller molecules are taken into the bloodstream. This occurs primarily in the small intestine.
* Diffusion: This is the passive movement of molecules from a region of higher concentration to a region of lower concentration. Once the digested nutrients are in the bloodstream, they reach the cells, where they move from a higher concentration (bloodstream) to a lower concentration (inside the cell) to be used for energy, growth, and repair.
Important Note: While diffusion is the primary mechanism for nutrient entry into cells, some nutrients require active transport. This process requires energy to move molecules against their concentration gradient, from a lower concentration to a higher concentration.
Let me know if you have any other questions!
