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How is lymph formed? State… (Class 10 Science 2025, Q23A)

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ScienceCBSE Class 10 · Board exam 2025, set 31/5/1 · 2 marks · Very short answer

CBSE Class 10 Science 2025: question 23(A)

Set in the CBSE Class 10 board exam of 2025, paper 31/5/1, section B, question 23(A), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q23(A) · 2 marks · Very short answerLife Processes

How is lymph formed? State its important function.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 31/5/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Lymph begins as part of the blood; think about how it leaves the capillaries.

Hint 2

Recall what the lacteals in the intestinal villi absorb, and where lymph finally empties.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Formation: Some plasma, proteins and blood cells escape through the pores in the walls of capillaries into the intercellular spaces of tissues. This fluid is the tissue fluid, called lymph, and it drains into lymphatic capillaries.

    1 mark

  2. Function: Lymph carries digested and absorbed fat from the intestine. It also drains excess fluid from the intercellular spaces back into the blood.

    1 mark

Answer: Lymph forms when plasma, proteins and blood cells leak through capillary pores into intercellular spaces; it carries absorbed fat from the intestine and returns excess tissue fluid to the blood.

Where the marks are

  • Explains formation by leakage of plasma, proteins and blood cells through capillary pores into intercellular spaces (1 mark)
  • States a function: carries absorbed fat or drains excess fluid back to blood (1 mark)

Revise the chapter

  • Chapter: Life Processes (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Life Processes, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 31/5/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.