How Cell Structure Fits Function (how the shape and features of a cell help it to do its job) Bicycle How does form fit function of some of the different parts? Tennis Racket How does form fit function of some of the different parts? Red Blood Cell • Small and flexible to fit through tiny tubes. • NO nucleus to make more room for more oxygen Nerve Cell Long and branching arms to send messages quickly from any part of the body to the brain. Muscle Cell • Long and skinny to contract and extend for movement. • Lots of nuclei to help large cell communicate. • Lots of mitochondria because cells need lots of energy. White Blood Cell Can change shape to fit between tissues to find and fight infections. Leaf Cell Has chloroplasts to change light energy into food (photosynthesis). Root Cell • Many large vacuoles to soak up and store water for the plant. • NO chloroplasts because there is no light for photosynthesis.