while we look at end of the individual I’ll cry reel rocket with soul in this we isolated muscle fiber we took a way to start a battery taking on the traversed reveals the sir_ all that stuff and you can see that that there are these that there's e-ticket receipt alternating patterns along and the muscle fiber okay and what these are these are the contract how units are the contractile proteins of the muscles of the muscle cell itself okay or muscle fiber act now from a wine collide like this is what's called a circle mayor okay the circle near is the functional unit of muscle okay let's talk more dot mobile sarcommander little bit but I want to do about it I want to say this they remember functional units are the smallest organized parts of the machine that'll I what to-do its job okay so punctual units of the smallest organize parts of a mystery .