In peritoneal dialysis

Options

A. the blood is removed from the body and a natural filter is used
B. the blood is not removed from the body and a natural filter is used
C. the blood is not removed from the body and an artifical filter is used
D. the blood is removed from the body and an artificial filter is used.

Explanation

**Step-by-Step Solution:**

1. **Understanding Dialysis Types**:
- There are two major types of dialysis: hemodialysis and peritoneal dialysis.
- Hemodialysis involves the removal of blood from the body and filtering it outside using an artificial filter (dialyzer).
- Peritoneal dialysis, on the other hand, does not involve the removal of blood from the body.

2. **Defining Peritoneal Dialysis**:
- In peritoneal dialysis, the process occurs inside the body.
- It utilizes the peritoneal membrane as a natural filter to remove waste products from the blood.

3. **Analyzing the Statements**:
- Statement 1: "Blood is removed from the body and a natural filter is used." - This is incorrect for peritoneal dialysis.
- Statement 2: "Blood is not removed from the body and a natural filter is used." - This is correct for peritoneal dialysis.
- Statement 3: "Blood is not removed from the body and an artificial filter is used." - This is incorrect for peritoneal dialysis.
- Statement 4: "Blood is removed from the body and an artificial filter is used." - This describes hemodialysis, not peritoneal dialysis.

4. **Conclusion**:
- The correct statement regarding peritoneal dialysis is: "Blood is not removed from the body and a natural filter is used."

**Final Answer**: Blood is not removed from the body and a natural filter is used.

---