9.5 DAFAECATION

• What happens to the remaining content after nutrient absorption in the digestive system?


  It enters the colon.
• What does the intestinal content consist of after nutrient absorption?


  Water, undigested food, indigestible fibers, dead cells, and bacteria.
• What are the two main functions of the large intestine?


  Water and minerals reabsorption, and formation of feces.
• What metabolic byproducts are reabsorbed in the large intestine?


  Vitamin B, vitamin K, and folic acid.
• How does the absorption of water from undigested remains affect feces?


  It results in the formation of feces.
• What do feces consist of?


  Indigestible food remains, dead cells, bile pigments, bacteria, and toxic substances.
• What role does mucus secretion from the colon wall play?


  It aids the movement of feces along the colon.
• How long does it take for feces to pass to the rectum?


  12 to 24 hours.
• What happens as feces accumulate in the rectum?


  Pressure increases, causing a desire to expel feces.
• What occurs in the rectal wall during defecation?


  The muscles contract to expel feces via the anus.
• What is the process of expelling feces from the body called?


  Defecation.
• What are the key topics covered in the practice questions related to the digestive system?

  • Digestive System
  • Digestion
  • Absorption
  • Assimilation
  • Defaecation
  • Balanced Diet
  • Health Issues Related to the Digestive System and Eating Habits