# The lifespan of White Blood Cells is _____ day(s)? with Answer - Everyday Science Mcqs | TestPrep

> Solved MCQ: The lifespan of White Blood Cells is _____ day(s)? Correct Answer: D. 5 – 21 days. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

---

Tested in Competitive Exams:

- [NTS Test Prep](https://test-prep.blog/exams/nts)
- [FPSC Past Papers](https://test-prep.blog/exams/fpsc)
- [PPSC Solved MCQs](https://test-prep.blog/exams/ppsc)
- [PMDC MDCAT 2026](https://test-prep.blog/exams/mdcat)
- [UET ECAT Prep](https://test-prep.blog/exams/ecat)
- [CSS Central Superior](https://test-prep.blog/exams/css)

- [Everyday Science Mcqs](https://test-prep.blog/categories/everyday-science-mcqs)
Difficulty: Moderate 68% Accuracy

# The lifespan of White Blood Cells is _____ day(s)?

Direct Answer & Quick Reference

The correct option is **D. 5 – 21 days**.

White blood cells are made inside the bone marrow and stored in your blood and lymphatic tissues. Because some white blood cells have a short lifespan of one to three days , your b...

A. 1 – 5 days

B. 3 – 7 days

C. 4 – 8 days

D. 5 – 21 days **(Correct Answer)**

✨ Explain with AI

Verified Key: D. 5 – 21 days
Solved by 5,588+ students

**Detailed Explanation & Reference:**

White blood cells are made inside the bone marrow and stored in your blood and lymphatic tissues. Because some white blood cells have a short lifespan of one to three days , your bone marrow is constantly making them. WBC have short life span of 5 – 21 days . The lymphocytes are developed in the lymph glands.\xa0after which time they are destroyed in the lymphatic system.White blood cells act as antibodies and provide strength to body’s immune system. WBC are also known as leucocytes. Difference Between RBC and WBC Red blood cells (RBC) 1. They do not have nucleus at maturity 2. They possess haemoglobin and are red 3. They help in transport of respiratory gases. 4. They are about 5 million/ mm 3 of blood. 5. Life span 120 days 6. In the embryonic stage the RBC are formed in the live and spleen. But after birth, they are formed in the red bone marrow. The process of formation of RBC is known as erythropoiesis . White blood cells (WBC) 1. They have a large characteristic nucleus 2. They are colourless as they have no pigment 3. They help in defence mechanism 4. They are about 7000/mm 3 of blood 5. WBC have short life span of 5-21 days 6. WBC are formed in the red bone marrow. The process of formation of WBC is known as leucopoiesis .

- [Previous Question Which vitamin is primarily produced in the skin in response to sunlight?](https://test-prep.blog/mcq/which-vitamin-is-primarily-produced-in-the-skin-in-response-to-sunlight-82bc469b-c93d-4e4c-bc8b-8f7df1202682)
- [Next Question What is the largest type of shark?](https://test-prep.blog/mcq/what-is-the-largest-type-of-shark-66b8d5d2-f4a2-4de2-9956-b249cd292914)

- [Practice More Everyday Science Mcqs MCQs](https://test-prep.blog/quiz/smart?category=everyday-science-mcqs)
- [How We Verify Questions →](https://test-prep.blog/editorial-policy)

## Subject Overview

Explore thousands of solved past paper MCQs for Everyday Science Mcqs categorized with explanations.

- [Browse All Everyday Science Mcqs MCQs →](https://test-prep.blog/categories/everyday-science-mcqs)

## Related Questions

- [Which vitamin is primarily produced in the skin in response to sunlight?](https://test-prep.blog/mcq/which-vitamin-is-primarily-produced-in-the-skin-in-response-to-sunlight-82bc469b-c93d-4e4c-bc8b-8f7df1202682)
- [What is the largest type of shark?](https://test-prep.blog/mcq/what-is-the-largest-type-of-shark-66b8d5d2-f4a2-4de2-9956-b249cd292914)
- [Which gas is most commonly used in neon signs?](https://test-prep.blog/mcq/which-gas-is-most-commonly-used-in-neon-signs-149d8309-e26f-433b-9af3-ea2db3a5c123)
- [A chronometer meter measures _____ ?](https://test-prep.blog/mcq/a-chronometer-meter-measures-97354773-0550-44fc-90e8-4c9f17e481f0)
- [Which famous scientist formulated the laws of motion and universal gravitation?](https://test-prep.blog/mcq/which-famous-scientist-formulated-the-laws-of-motion-and-universal-gravitation-0d2faf46-0778-443b-bd7b-6fbc3985cf16)

---
*Source: https://test-prep.blog/mcq/the-lifespan-of-white-blood-cells-is-__________-days-25f94b7f-bb7e-4ffd-b852-26554aead1f0*
*Format: Markdown for Agents (Content Negotiation: text/markdown)*