Hank introduces connective tissue and explains where it is found in the body. He outlines four major classes of connective tissue and the role they play in the body: Proper, Cartilage, Bone, and Blood.

Hank discusses the parts of epithelial tissue and describes its functions.

Ralphie's robot will not move, and the class learns that it doesn't move because it lacks muscles. They find objects that can serve as muscles and use them to complete the robot's movement system.

Hank discusses the various types of connective tissue and explains what the body can and cannot easily break down.

Teacher Suzy sings about muscles. The song mentions that muscles are everywhere throughout our body, and each muscle serves a purpose. The video provides an illustration of the muscular system and explains some common actions that muscles help us perform, such as smiling.