Which of the following show the least constancy of shape ?

Options

A. Leucocytes
B. Visceral muscle cells
C. Neurons
D. Erythrocytes

Answer

To determine which of the following options shows the least constancy of shape, we will analyze each option provided: leukocytes, visceral muscle cells, neurons, and erythrocytes.

### Step-by-Step Solution:

1. **Understand the Options**:
- **Leukocytes**: These are white blood cells that play a crucial role in the immune response. They can change shape as they move through tissues and engulf pathogens.
- **Visceral Muscle Cells**: These are smooth muscle cells found in organs. They have a more consistent shape but can still change slightly during contraction.
- **Neurons**: Neurons have a distinct shape with a cell body and long axons and dendrites, which are relatively consistent.
- **Erythrocytes**: These are red blood cells that have a biconcave disc shape, which is quite consistent.

2. **Analyze the Shape Consistency**:
- **Leukocytes**: They exhibit an amoeboid shape, allowing them to change form significantly while performing their function of engulfing pathogens. This ability to change shape means they have the least constancy of shape.
- **Visceral Muscle Cells**: They maintain a more stable shape compared to leukocytes but can change during contraction.
- **Neurons**: Their structure is relatively fixed and does not change shape significantly.
- **Erythrocytes**: They have a defined shape (biconcave) that remains consistent.

3. **Conclusion**:
Based on the analysis, leukocytes (white blood cells) show the least constancy of shape due to their ability to change shape significantly while performing their immune functions.

### Final Answer:
**Leukocytes show the least constancy of shape.**