Multiple choice

How many types of blood cells are there?

  1. 3

  2. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cellular portion of human blood consists of three primary types of cells: red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). Each type has a distinct and vital role, such as oxygen transport, immune defense, and blood clotting. Together, they make up about 45 percent of blood volume.

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