Question

Label the parts of the digestive system and write their functions.

Answer 1

• Salivary glands are present in the mouth and secrete saliva which breaks down starch into simple sugars.
• The stomach is a J-shaped organ that produces HCl ie., Hydrochloric acid which makes the environment of the stomach acidic in nature.
• The stomach also secretes gastric juices (digestive juices). And it breaks down proteins into amino acids.
• The liver secretes bile which helps in the breakdown of large fat droplets into the smaller droplets.
• The small intestine secretes intestinal juices which further breaks down the food into absorbable nutrients as:
  • Carbohydrates is broken down into glucose.
  • Protein is broken down into amino acids.
  • Fats are broken down into fatty acids and glycerol.