Name the six functional activities of the digestive system.

Verified step by step guidance

1. Understand that the digestive system performs several key functions to process food and absorb nutrients necessary for the body.
2. Identify the first functional activity: Ingestion, which is the process of taking food into the mouth.
3. Recognize the second activity: Propulsion, which includes swallowing and the movement of food through the digestive tract via peristalsis.
4. Note the third activity: Mechanical digestion, involving physical breakdown of food through chewing, churning, and segmentation.
5. List the remaining activities: Chemical digestion (breaking down food molecules by enzymes), Absorption (nutrients passing into the blood or lymph), and Defecation (elimination of indigestible substances as feces).

Key Concepts

Ingestion

Ingestion is the process of taking food into the mouth, initiating digestion. It involves chewing and swallowing, which prepare food for further breakdown in the digestive tract.

Digestion

Digestion refers to the mechanical and chemical breakdown of food into smaller molecules. Mechanical digestion includes chewing and churning, while chemical digestion involves enzymes breaking down complex molecules.

Absorption

Absorption is the process by which nutrients from digested food pass through the lining of the intestines into the bloodstream. This allows the body to utilize essential nutrients for energy, growth, and repair.