The diaphragm is the large flat muscle. hope that helps :)
<h2><u>its is (A) skeletal and muscular</u> </h2><h2>because without skeletal ur body want be able to move also the muscular system do the sam but it give u strength to move it.</h2>
(15) Label 1 is D
(16) Label 2 is A
(17) Label 3 is B
(18) Label 4 is C
