The invasion of cancerous cells from one part of the body to another of body is called

Options

A. Contact inhibition
B. Metastasis
C. Benign tumour
D. Tumour

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process by which cancerous cells invade from one part of the body to another.

2. **Identifying Key Terms**: The key terms in the question are "invasion," "cancerous cells," and "from one part of the body to another."

3. **Reviewing Options**: The options provided include:
- Option 1: Contact inhibition
- Option 2: Metastasis
- Option 3: Benign tumor
- Option 4: Malignant tumor

4. **Analyzing Option 1 (Contact Inhibition)**: Contact inhibition is a process where cell growth is halted when cells come into contact with each other. This does not relate to the spread of cancerous cells, so this option is incorrect.

5. **Analyzing Option 2 (Metastasis)**: Metastasis refers to the process in which cancerous cells break away from their original tumor, travel through the bloodstream or lymphatic system, and form new tumors in other parts of the body. This matches the description in the question.

6. **Analyzing Option 3 (Benign Tumor)**: A benign tumor is non-cancerous and does not invade other parts of the body. This option is incorrect.

7. **Analyzing Option 4 (Malignant Tumor)**: While malignant tumors are cancerous, the term "malignant" does not specifically describe the process of invasion from one part of the body to another. Therefore, this option is also incorrect.

8. **Conclusion**: The correct answer to the question is **metastasis**, as it accurately describes the invasion of cancerous cells from one part of the body to another.

**Final Answer**: The invasion of cancerous cells from one part of the body to another is called **metastasis**.

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