Absorption

• Digestion converts ingested materials into


  molecules small enough for absorption
• Absorption occurs through


  active transport, simple diffusion, facilitated diffusion, secondary active transport, and endocytosis
• Monomers of carbohydrates, proteins, and nucleic acids are absorbed via


  blood capillaries
• Monomers of lipids are absorbed through


  lacteals (lymphatic systems)
• Minerals and electrolytes are


  absorbed almost completely
• Fat-soluble vitamins A, D, E, and K are absorbed by


  lacteals along with lipids
• Water-soluble vitamins absorbed by


  blood
• Water absorption occurs primarily in

  small intestine and remaining occurs in large intestine