The myofibril is the basic muscle cell, within which is the sarcomere, the basic unit of muscle contraction.
Muscular system
the esophogus
Kill bacteria
Ciliary body
Basically its a closed loop of tubes, except for the muscular structure of the heart.
The diaphragm.
It is gizzard. -Alangator
yes
Snails glide on their muscular feet.
iris
Nter ventricular septum
the muscule in the tounge and the jaw