GED Science TestLife ScienceEasy
Which component of the human blood is primarily responsible for transporting oxygen from the lungs to the body's tissues?
- ARed blood cells
- BPlatelets
- CWhite blood cells
- DPlasma
Show answer & explanationAnswer & explanation
Correct answer: A. Red blood cells
Red blood cells contain hemoglobin, a protein that binds to oxygen in the lungs and releases it in the body's tissues, making them the primary transporters of oxygen.
Why the other options are wrong
- B. Platelets are involved in blood clotting.
- C. White blood cells are part of the immune system and fight infection.
- D. Plasma is the liquid component of blood, transporting nutrients, hormones, and waste, but not primarily oxygen.
Red Blood Cells (Erythrocytes)
Biconcave, anucleated cells in the blood that contain hemoglobin and are primarily responsible for oxygen transport throughout the body.
- Contain hemoglobin
- Transport oxygen and some carbon dioxide
- Lack a nucleus in mature form
- Produced in bone marrow
- Account for about 40-45% of blood volume
Memory trick: Red for Oxygen, White for Fight, Plates for Clot, Plasma for All Else.