In the lymphatic system, the lacteal is found in t (2025)

Communtiy question

Biology

The answer is the last one: absorb fatty acids and glycerol.

Explanation for each option:

1. Absorb amino acids: This is incorrect. Amino acids are absorbed directly into the bloodstream through the capillaries in the villi of the small intestine, not through the lacteals.

2. Absorbs glucose: This is incorrect. Glucose, like amino acids, is absorbed directly into the bloodstream through the capillaries in the villi of the small intestine.

3. Absorb blood cells: This is incorrect. Blood cells are not absorbed in the digestive system; they are produced in the bone marrow and circulate in the bloodstream.

4. Absorb fatty acids and glycerol: This is correct. The lacteals are specialized lymphatic capillaries located in the villi of the small intestine. They are responsible for absorbing dietary fats, specifically fatty acids and glycerol, which are then transported as chylomicrons through the lymphatic system.

In summary, the lacteals in the small intestine primarily function to absorb fatty acids and glycerol.

Answer

The correct answer is: Absorb fatty acids and glycerol.

Explanation

1. Structure of Intestinal Villi: The small intestine's inner lining is covered with finger-like projections called villi, which greatly increase the surface area for absorption. Each villus contains:a) Blood capillariesb) A central lacteal (lymphatic capillary)

2. Absorption of Different Nutrients:a) Water-soluble nutrients (glucose, amino acids, vitamins) are absorbed directly into the blood capillaries.b) Lipids (fats) are absorbed into the lacteals.

3. Process of Fat Absorption:a) Dietary fats are broken down into fatty acids and glycerol by lipases.b) These components are absorbed by intestinal epithelial cells.c) Inside these cells, fatty acids and glycerol are reassembled into triglycerides.d) Triglycerides are packaged with proteins to form chylomicrons.e) Chylomicrons are too large to enter blood capillaries, so they enter the lacteals.

4. Function of Lacteals:a) Lacteals are specialized lymphatic vessels in the villi.b) They specifically absorb fatty acids and glycerol (in the form of chylomicrons).c) This absorption route bypasses the liver, allowing fats to be distributed directly to body tissues.

5. Elimination of Other Options:a) Amino acids and glucose are absorbed via blood capillaries, not lacteals.b) Blood cells are not absorbed in the digestive system at all.

Key Concepts

1. Intestinal Villi Structure: Villi contain both blood capillaries and a central lacteal for efficient nutrient absorption.
2. Selective Absorption: Different nutrients are absorbed through different pathways based on their solubility and size.
3. Lymphatic System in Digestion: The lymphatic system, via lacteals, plays a crucial role in fat absorption and transport.