The largest RBCs are found in amphibians $(Amphiuma)$ of $70 - 80\mu.$ In mammals, largest RBCs are found in elephant of $9.4\ \mu.$ The RBCs of man are $7.5 - 8\ \mu$ in size.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.