The phagocytosis was first of all seen by

Options

A. Huxley
B. Strasburger
C. Haeckel
D. metchnikoff

Answer

### Step-by-Step Solution:

1. **Understanding Phagocytosis**:
Phagocytosis is a cellular process where a cell, specifically a phagocyte, engulfs solid particles. This process results in the formation of an internal vesicle known as a phagosome.

2. **Identifying the Scientists**:
The question asks which scientist first observed phagocytosis. The options provided are:
- 1st: Euclid
- 2nd: Strasburger
- 3rd: Hegel
- 4th: Magdeburg

3. **Evaluating Each Option**:
- **Euclid**: Known for his contributions to mathematics, particularly geometry. He is not associated with biological processes like phagocytosis. **(Incorrect)**
- **Strasburger**: Famous for his work on the stages of nuclear and cellular division in algae and higher plants. He did not discover phagocytosis. **(Incorrect)**
- **Hegel**: A philosopher known for his contributions to dialectics and idealism, not biology. **(Incorrect)**
- **Magdeburg (Metchnikoff)**: The correct scientist who first observed phagocytosis. He is known for his work in immunology and for coining the term "phagocytosis."

4. **Conclusion**:
The scientist who first observed phagocytosis is **Metchnikoff** (often referred to by his place of origin, Magdeburg).

### Final Answer:
The phagocytosis was first of all seen by **Metchnikoff**.

---