| A | B |
|---|
| cytoskeleton | long protein strands - 0 membranes; support for the cell |
| cell and organelle movement | made up of microfilaments and microtubules |
| microfilaments | threads made of two protein called actin |
| movement | created by adding or taking away actin molecules |
| microtubules | hollow tubes of protein; extend out of central part of cell and attach to membrane |
| central support for cell | during cell division, they become spindle fibers and move chromazones to opposite cells |
| centriole | treasure chest on cell drawing - 0 membranes |
| microtubules | when division is done, fibers are disassembled and return to microtubules providing support |
| cilia and flagella | microtubules wrapped in membranes |
| cilia | line cells and help cells move or trap particles (respiratory cells) |
| flagella | help cells move (sperm have whiplike motion) |
| nucleus | has protein skeleton that helps retain its shape, called nuclear matrix |
| nuclear envelope | has small holes called nuclear pores; allow for entrance and exit of molecules |
| chromatin | fine strands inside the nuclear matrix (DNA and protein) |
| when cell about to divide | chromatin coils up and becomes chromosomes |
| nucleolus | sperical where ribosomes are made in the nucleus |
