AP BIOLOGY

Detailed explanation-1: -RBCs contain hemoglobin (pronounced: HEE-muh-glow-bin), a protein that carries oxygen. Blood gets its bright red color when hemoglobin picks up oxygen in the lungs. As the blood travels through the body, the hemoglobin releases oxygen to the different body parts.

Detailed explanation-2: -Red blood cells contain a protein called hemoglobin, which carries oxygen from the lungs to all parts of the body.

Detailed explanation-3: -Red blood cells contain hemoglobin and are covered with a membrane composed of proteins and lipids. Hemoglobin-an iron-rich protein that gives blood its red color-enables red blood cells to transport oxygen and carbon dioxide. Red blood cells do not have nuclei, allowing for more room for hemoglobin.

Detailed explanation-4: -Red blood cells, or erythrocytes, are one of the components of blood. (The others are plasma, platelets and white blood cells.) They are continuously produced in our bone marrow.

Detailed explanation-5: -After leaving the heart, the red blood cell travels through the pulmonary artery to the lungs. There it picks up oxygen making the deoxygenated red blood cell now an oxygenated blood cell. The blood cell then makes it way back to the heart via the pulmonary vein into the left atrium.