What are the parts to a unicycle?

the unicycle is very simple, from top down the parts are as follows:

seat, -to sit on, different from a bike seat in style, so legs can go strait down to pedals directly underneath it.)

seat post-connected to the seat with several ways, a 4-bolt square bracket, or bike-style connection, usually. other than that its a metal post.

Frame- connects seat post to wheel, a clamp of some sort tighens on the top of it, which squeezes on the seat post, keeping it there, at the ajusted height. it then splits at the crown, into 2 vertical posts.

-bearings- ball bearing usually; connects frame to hub. (lollipop style, is another way to make this connection)

hub- center of wheel, with spokes leaving it to the rim.

spokes- same as a bike, connected to rim to provide strength and stablility.

rim- metal outside o wheel. provides strength to the inner tube and tire.

crank arms- connect pedals to hub. stronger than bike, and right ones don't have crank system (except for girraffes)

-pedals (same as bikes)

that's about it, although there may be more/less depending with the unicycle.

brakes, crank system, handle bars (attached to seat post) second and third wheels (vertical) all might be included.