Part of the small and large intestine absorbs water and via feces, it is expected. Arrange these in order of the amount of water absorbed or secreted from greatest to smallest.

Options

A. Colon, jejunum, ileum
B. Colon, ileum, jejunum
C. Jejunum, ileum, colon
D. Ileum, jejunum, colon

Answer

To solve the question regarding the order of water absorption in the small and large intestine, we need to consider the specific parts of the intestines mentioned: jejunum, ileum, and colon. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Identify the Parts of the Intestine**:
- The small intestine consists of three main parts: duodenum, jejunum, and ileum.
- The large intestine consists of several parts, including the colon.

2. **Understand the Function of Each Part**:
- **Jejunum**: This is the middle section of the small intestine and is highly coiled, which increases its surface area for absorption. It is known for absorbing a significant amount of nutrients and water.
- **Ileum**: This is the final part of the small intestine. It also absorbs nutrients and water, but generally less than the jejunum.
- **Colon**: The colon (large intestine) is responsible for absorbing water and electrolytes from the remaining indigestible food matter and is crucial for forming feces.

3. **Rank the Parts Based on Water Absorption**:
- The jejunum has the highest capacity for water absorption due to its structure and function.
- The ileum follows, absorbing less water than the jejunum but still contributing significantly.
- The colon absorbs water as well, but its capacity is less than that of the jejunum and ileum.

4. **Final Arrangement**:
- Based on the absorption capacity, the order from greatest to smallest amount of water absorbed is:
1. **Jejunum**
2. **Ileum**
3. **Colon**

### Final Answer:
The order of water absorption from greatest to smallest is:
- **Jejunum > Ileum > Colon**