In our body, where does 90% of our total nutrients and mineral absorption take place?

Correct option is D

The correct answer is (D) Small intestine

Explanation:

• The small intestine is the primary site for the digestion and absorption of nutrients, where approximately 90% of nutrient and mineral absorption occurs.

• It is divided into three parts: the duodenum, jejunum, and ileum.

• The inner wall of the small intestine contains millions of tiny, finger-like projections called villi and microvilli.

• These villi vastly increase the surface area available for absorption, allowing nutrients to pass efficiently into the bloodstream.

• While the remaining 10% of absorption takes place in the stomach and large intestine, the small intestine handles almost all proteins, carbohydrates, fats, vitamins, and minerals.

Information Booster:

• The duodenum primarily handles chemical digestion, while the jejunum and ileum are mainly responsible for the absorption of nutrients into the blood and lymph.

• The small intestine is the longest part of the alimentary canal, measuring about 6 to 7 metres in an adult human, though it is narrower in diameter than the large intestine.

Additional Knowledge:Kidney (Option A)

• The kidneys are part of the excretory system, not the digestive system.

• Their primary function is to filter waste products from the blood and regulate water and electrolyte balance.

Large intestine (Option B)

• Its main role is the absorption of water and electrolytes from indigestible food residues.

• It also facilitates the formation and temporary storage of feces before excretion.

Stomach (Option C)

• The stomach primarily functions in the mechanical and chemical breakdown of food (especially proteins) using gastric juices.

• Only a very small amount of absorption occurs here, such as water, certain salts, and alcohol.