Question

At each of the following locations, indicate what type of digestion (Chemical, Mechanical, Both, or Neither) takes place. Also, Indicate the organs in which absorption of the food or water occurs. (Emphasis on the second part about indicating which organs the absorption of food or water occurs).

O Mouth
O Stomach
O Small Intestine
O Large Intestine

Answer 1

Digestion involves both mechanical and chemical processes, with mechanical digestion occurring in the mouth and stomach, and chemical digestion mainly in the small intestine. The small intestine is the primary site for nutrient absorption, while the large intestine reabsorbs water and electrolytes.

Step-by-step explanation:

Types of Digestion and Absorption in the Human Body

At each of the following locations, different types of digestion and absorption occur:

• Mouth: Both mechanical and chemical digestion begin here. Mechanical digestion involves chewing, while chemical digestion starts with enzymes like amylase in saliva breaking down carbohydrates. However, little to no absorption occurs in the mouth.
  
• Stomach: Mechanical digestion continues as the stomach muscles churn the food, and chemical digestion occurs with the action of enzymes like pepsin. The stomach can absorb some substances like water, alcohol, and some drugs, but it is not a major site for the absorption of nutrients.
  
• Small Intestine: This is where most of the chemical digestion and absorption take place. The small intestine's lining is specially adapted for absorption, with its vast surface area allowing nutrients to enter the bloodstream.
  
• Large Intestine: The large intestine (colon) is primarily involved in absorbing water and electrolytes. It also absorbs some vitamins produced by colon bacteria. No significant digestion occurs here, but it is essential for water reabsorption and feces formation.