The scientist who developed the technique of keeping tissues and organs alive outside the body is

Options

A. (a) Ringer
B. (b) Cannon
C. (c) Lorenz
D. (d) Binning and Rohrer.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks for the scientist who developed the technique of keeping tissues and organs alive outside the body. This involves identifying the scientist associated with a significant contribution to organ preservation or in vitro studies.

2. **Analyzing the Options:**
- **Option A: Ringer (Sidney Ringer):** He was a physiologist and pharmacologist known for inventing the Ringer solution, which is crucial for organ transplantation and in vitro studies.
- **Option B: Cannon:** He studied the fight or flight response, which is unrelated to organ preservation.
- **Option C: Lawrence:** He focused on animal behavior, which does not pertain to the question.
- **Option D: Binning and Rohrer:** They contributed to the discovery of microscopy, which is not relevant to keeping tissues and organs alive.

3. **Identifying the Correct Answer:** Based on the analysis, Sidney Ringer is the scientist who developed the Ringer solution, which is used to keep tissues and organs alive outside the body. Therefore, the correct answer is **Option A: Ringer.**

4. **Understanding the Ringer Solution:** The Ringer solution contains essential components like sodium chloride, potassium chloride, calcium chloride, sodium bicarbonate, and magnesium sulfate, which help maintain osmotic balance and provide nutrients to the tissues.

5. **Conclusion:** The scientist who developed the technique for keeping tissues and organs alive outside the body is **Sidney Ringer.**

---