I am an animal cell that needs to travel fast from one place to another inside the body. I need to be able to travel through small spaces quickly. My function is to distribute a gas essential for life. Who am I?
Erythrocyte
Red blood cells (RBCs), also called erythrocytes, are the animal's principal means of delivering oxygen to the body tissues—via blood flow through the circulatory system. Mature RBCs lack a nucleus and many cellular organelles like mitochondria which increase the efficiency of oxygen transport.