7 terms

filaments with in a sarcomere

A contracting unit of muscles; Z line to Z line
Z disc
is the boundary of sarcomere, they separate one sacomere from the next, formed by structural proteins.
A band
of thick filaments extends the entire length of the thick filaments- form the darken middle length.
zone of overlap
both thick and thin filaments- where the thick and thin filaments lie side by side.
I band
is thin filament- is lighter and z disc runs through it.
H zone
only thick filaments sub set of A band.
M line
(in center) is the middle of H zone also composed of structural proteins.