Which blood cells in human beings are primarily responsible for defending the body against invading pathogens and infections?

💡 Solution & Explanation

White blood cells, also known as leucocytes, form an integral part of the immune system by identifying and destroying bacteria, viruses, and foreign invaders. Red blood cells transport oxygen via hemoglobin, whereas platelets assist in blood clotting. Leucocytes can change shape and squeeze through capillary walls to reach infection sites.