What do Nematodes die of ? We dont know.. but their muscles do degenerate like ours.

Blocking their insulin pathway (starvation) makes them live up to 6 times! more. It activates genetic programs (rnai protective pathways) that protect the somatic cells from mutations just as in the germ line cells.

Nature Podcast june11,09 Gary Ruvkun

Fat cells acumulate with age in the bone marrow, preventing the proliferation of white and red blood cells.

Nature may14, Olaia Naveiras