Question: Melvin H. Knisely was an American physiologist who first observed the pathological clumping of red blood cells which are also called what?
Sentence (from "Red blood cell"): Red blood cells (RBCs), also called erythrocytes, are the most common type of blood cell and the vertebrate's principal means of delivering oxygen (O) to the body tissues—via blood flow through the circulatory system.
Relevant evidence: Yes