Which pigment is responsible for the red color of human blood cells, allowing them to bind and transport oxygen?

💡 Solution & Explanation

Hemoglobin is an iron-containing metalloprotein found in red blood cells that reversibly binds oxygen to transport it from the lungs to body tissues. Pigments like hemocyanin contain copper and are found in invertebrates, while chlorophyll is essential for plant photosynthesis. An adult human body typically contains millions of red blood cells circulating continuously to maintain cellular respiration.