What happens if the small intestine is missing?

If the small intestine is missing, it can have several serious consequences for the body's digestive and overall health. Here's what would happen:

1. Nutrient Absorption: The small intestine is responsible for absorbing most of the nutrients from the food we eat. Without a small intestine, the body would be unable to absorb essential nutrients, including carbohydrates, fats, proteins, vitamins, and minerals.

2. Malnutrition: Due to the lack of nutrient absorption, a person with a missing small intestine would become malnourished. This can lead to a variety of health problems, including weakness, fatigue, weight loss, and deficiencies in specific vitamins and minerals.

3. Short-Bowel Syndrome: The absence of the small intestine results in a condition known as short-bowel syndrome (SBS). SBS can cause severe diarrhea and dehydration, as well as malabsorption and malnutrition.

4. Digestive Problems: Without a small intestine, the digestion of food would be severely compromised. This can lead to abdominal pain, nausea, vomiting, bloating, and gas.

5. Electrolyte Imbalances: The small intestine also plays a role in the absorption of electrolytes like sodium, potassium, and chloride. Without these electrolytes, the body can experience imbalances that can affect muscle function, nerve transmission, and fluid balance.

6. Weight Loss: Malabsorption of nutrients and persistent diarrhea can lead to significant weight loss and muscle wasting.

7. Dependence on Intravenous Nutrition: Individuals with a missing small intestine may require long-term intravenous nutrition (TPN) to provide the body with the necessary nutrients and fluids.

8. Increased Risk of Infections: The small intestine also acts as a protective barrier against harmful microorganisms. Without it, the risk of infections and sepsis increases.

9. Surgical Interventions: The management of a missing small intestine often involves surgical procedures to bypass or reconstruct the digestive tract. These surgeries can be complex and carry their own risks and complications.

10. Long-Term Health Effects: The long-term health consequences of a missing small intestine can be significant and may require ongoing medical care and nutritional support.

It's important to note that the degree of impact and the approach to management may vary depending on the specific circumstances of the individual, including the remaining length and functionality of the digestive tract.