Final answer:
Red blood cells are known as erythrocytes, cells that carry oxygen and carbon dioxide in the body. Thrombocytes, involved in blood clotting, are more accurately called platelets.
Step-by-step explanation:
Red blood cells are also known as erythrocytes. These are specialized cells that circulate through the body delivering oxygen to cells, and carbon dioxide from cells to the lungs. Erythrocytes are formed from stem cells in the bone marrow and are recognizable by their small, biconcave shape and lack of a nucleus in mammals. Thrombocytes, another name for platelets, are cell fragments involved in clot formation, while leukocytes refer to white blood cells like neutrophils, which are essential for immune response.
Answering the student's question, red blood cells are also known as option a) Erythrocytes. To address question 20 from the reference material, thrombocytes are more accurately called d) platelets.