What is the primary function of the small intestines?
A: Uses mechanical digestion to break down food particles
B: Uses chemical digestion and absorbs nutrients the body needs
C: Carries food and nutrients throughout the body
D: Eliminates the waste the body does not need
B: Uses chemical digestion and absorbs nutrients the body needs
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Which is a correct statement about the excretory system?
A: Key organs of the system include bladder, intestines, and kidneys.
B: It is similar to the digestive system in that they both rid the body of waste.
C: It rids the body of food that the body did not absorb.
D: The other name for the system is the circulatory system.
B: It is similar to the digestive system in that they both rid the body of waste.
The correct answer is B: Uses chemical digestion and absorbs nutrients the body needs.
To arrive at this answer, we can start by understanding the different organs involved in the digestive system. The small intestines are a part of this system, along with the stomach, large intestines, and other organs.
The primary function of the small intestines is to continue the process of digestion and absorption of nutrients. After food leaves the stomach, it enters the small intestines. Here, the small intestines further break down the food using enzymes, which is known as chemical digestion. This breakdown of food particles allows for easier absorption of nutrients.
The inner lining of the small intestines has specialized structures called villi and microvilli. These increase the surface area of the intestines, providing more space for absorption. Through these structures, the nutrients from the digested food are absorbed into the bloodstream and transported to the cells and tissues of the body for energy, growth, and repair.
Therefore, the primary function of the small intestines is to perform chemical digestion and absorb the nutrients the body needs from the food we eat.