Formation of faeces and defecation

Formation of faeces and defecation

• 1.
  6.6 FORMATION OFFAECES AND DEFECATION
• 2.
  The Large Intestine Sigmoid colon
• 3.
  1.5m absorb water and compact material in faeces Store faeces to be defecated Caecum : A pouch with the appendix (9cm) as an extension Absorb vitamins Rectum = 15cm produced by Appendix : Plays no part in digestion bacteria
• 4.
  FORMATION OF FAECESAND DEFECATION 1. Undigested food comes from ileum into the colon consists of indigestible materials (cellulose) and liquid. 2. Undigested food goes …….>> ASCENDING COLON  TRANSVERSE COLON  DESCENDING COLON 1. WATER!!! SALTS!!! and VITAMINS!!! are absorbed into the colon, and the remaining contents in the lumen becomes faeces.
• 5.
  3. By thetime faeces reach the sigmoid colon, it is quite compact and dry. 4. The sigmoid colon is designed to slow down the movement of faeces until is ready to be eliminated. 5. The rectum is the lowermost segment of the large intestine that stores the faeces. 6. The rectum has a specialised muscle, called the anal called the anal sphinter, which relaxes and egests (for defecates) the faeces through the anus.
• 6.
  Defective defecation cause: DIsChargingg Waste!! + • headache Unwanted toxic substances!! • abdominal discomfort, to avoid toxicity…… • poor appetite and • sensation of vomiting IMPORTANCE OF THE DEFECATION If the colon retains its contents If constipation frequently too long, the fecal matter takes place, it causes becomes dried out and ill-health and increases the compresses into hard risk of contracting masses causing constipation colon cancer!! and haemorrhoids
• 7.
  Constipation DEFECATION RELATED PROBLEMS Haemorrhoids Colon Cancer