Final answer:
Red blood cells, or erythrocytes, are specialized cells responsible for carrying oxygen throughout the body. They lack a nucleus and have a biconcave shape to maximize oxygen transport. They are produced in the bone marrow.
Step-by-step explanation:
Red blood cells, also known as erythrocytes, are responsible for transporting oxygen throughout the body. They are produced in the bone marrow and are filled with a protein called hemoglobin, which carries oxygen from the lungs to the rest of the body. Unlike leukocytes (white blood cells) and thrombocytes (platelets), red blood cells do not have a nucleus and have a unique biconcave shape that allows for flexibility and more efficient oxygen transport.
Learn more about Red blood cells and their role in oxygen transport