The sound from the valves can be heard through the tissues (groups of similar cells that perform special functions) of the body and is often described as a lub-dub sound.
(The sound from the valves; can be heard; ) (similar cells; perform; special functions) (The sound from the valves; is described; as a lub-dub sound; T:often)
The sound from the valves similar cells The sound from the valves
can be heard perform is described
special functions
as a lub-dub sound T:often