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Read the following statements and select the correct option.
Statement 1 : The human small intestine is the longest portion in the alimentary canal.
Statement 2 : Absorption of digested food requires a very large surface area.
Statement 1 : The human small intestine is the longest portion in the alimentary canal.
Statement 2 : Absorption of digested food requires a very large surface area.
- a)Both statement 1 and 2 are correct.
- b)Statement 1 is correct but statement 2 is incorrect.
- c)Statement 1 is incorrect but statement 2 is correct.
- d)Both statements 1 and 2 are incorrect.
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Read the following statements and select the correct option.Statement ...
The human small inteestine is the longest (6.25m) part of alimentary canal. Villi present in the small intestine increase it surface area for absorption as most of the absorption occurs in small intestine.
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Read the following statements and select the correct option.Statement ...
Human Small Intestine and Absorption of Digested Food
Statement 1: The human small intestine is the longest portion in the alimentary canal.
The alimentary canal, also known as the digestive tract, is a long tube that extends from the mouth to the anus. It is responsible for the digestion and absorption of food. The human small intestine is a part of the alimentary canal and is indeed the longest portion.
The small intestine is divided into three parts: the duodenum, jejunum, and ileum. It is located between the stomach and the large intestine. The length of the small intestine in an average adult is approximately 6 meters (20 feet). This length allows for a significant surface area for the absorption of nutrients.
Statement 2: Absorption of digested food requires a very large surface area.
The process of digestion involves breaking down complex food molecules into smaller, simpler forms that can be absorbed by the body. Once the food is broken down, the nutrients are absorbed into the bloodstream to be utilized by the body's cells.
To facilitate efficient absorption, the small intestine has a large surface area. This is achieved through various adaptations:
1. Villi: The inner lining of the small intestine is covered in finger-like projections called villi. These villi increase the surface area by providing a large number of tiny folds.
2. Microvilli: Each individual cell on the surface of the villi has further microscopic finger-like projections called microvilli. These microvilli further increase the surface area for absorption.
3. Length: As mentioned earlier, the small intestine is long, providing a larger surface area compared to other parts of the digestive system.
The combination of the length, villi, and microvilli greatly increases the surface area available for the absorption of nutrients. This allows for efficient absorption of digested food, ensuring that the body receives the necessary nutrients for proper functioning.
Conclusion:
Both statements are correct. The human small intestine is indeed the longest portion in the alimentary canal, and the absorption of digested food does require a very large surface area. The small intestine achieves this through its length and the presence of villi and microvilli.
Statement 1: The human small intestine is the longest portion in the alimentary canal.
The alimentary canal, also known as the digestive tract, is a long tube that extends from the mouth to the anus. It is responsible for the digestion and absorption of food. The human small intestine is a part of the alimentary canal and is indeed the longest portion.
The small intestine is divided into three parts: the duodenum, jejunum, and ileum. It is located between the stomach and the large intestine. The length of the small intestine in an average adult is approximately 6 meters (20 feet). This length allows for a significant surface area for the absorption of nutrients.
Statement 2: Absorption of digested food requires a very large surface area.
The process of digestion involves breaking down complex food molecules into smaller, simpler forms that can be absorbed by the body. Once the food is broken down, the nutrients are absorbed into the bloodstream to be utilized by the body's cells.
To facilitate efficient absorption, the small intestine has a large surface area. This is achieved through various adaptations:
1. Villi: The inner lining of the small intestine is covered in finger-like projections called villi. These villi increase the surface area by providing a large number of tiny folds.
2. Microvilli: Each individual cell on the surface of the villi has further microscopic finger-like projections called microvilli. These microvilli further increase the surface area for absorption.
3. Length: As mentioned earlier, the small intestine is long, providing a larger surface area compared to other parts of the digestive system.
The combination of the length, villi, and microvilli greatly increases the surface area available for the absorption of nutrients. This allows for efficient absorption of digested food, ensuring that the body receives the necessary nutrients for proper functioning.
Conclusion:
Both statements are correct. The human small intestine is indeed the longest portion in the alimentary canal, and the absorption of digested food does require a very large surface area. The small intestine achieves this through its length and the presence of villi and microvilli.
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Read the following statements and select the correct option.Statement 1 : The human small intestine is the longest portion in the alimentary canal.Statement 2 : Absorption of digested food requires a very large surface area.a)Both statement 1 and 2 are correct.b)Statement 1 is correct but statement 2 is incorrect.c)Statement 1 is incorrect but statement 2 is correct.d)Both statements 1 and 2 are incorrect.Correct answer is option 'A'. Can you explain this answer?
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