Question 10 of 14beginner💡 UnderstandShort Answer2 marks

Explain what is meant by metastasis.

Correct Answer

Metastasis is the property of malignant tumors where cells sloughed from the tumor reach distant sites through blood. Wherever these cells get lodged in the body, they start a new tumor there.

This property is considered the most feared property of malignant tumors because it enables cancer cells to spread to different parts of the body from the original location. The cancerous cells grow rapidly, invade and damage surrounding normal tissues, and compete with normal cells for vital nutrients.

Exercise: EXERCISES | Q: 13 | (Page 22)
For More Understanding

Explanation

The textbook defines metastasis specifically in the context of malignant tumors. The key points are: (1) cells detach from the tumor, (2) travel through blood to distant sites, (3) get lodged at new locations, and (4) start new tumors there. This distinguishes malignant tumors from benign tumors, which remain confined to their original location. The 2-mark answer covers the definition and significance of metastasis.

Solution Steps

  1. Step 1: Define metastasis as the property of malignant tumors to spread to distant sites

  2. Step 2: Explain the mechanism - cells slough off, travel via blood, lodge elsewhere, and form new tumors

  3. Step 3: Mention why it is medically significant (most feared property)

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