N?u b?n c?m th?y cách phân chia này ph?c t?p thì có th? hi?u ??n gi?n h?n khi c?u t?o c?a b?m ???c phân chia thành 2 ph?n:The diaphragm is a crucial muscle that separates the upper body cavity with the abdominal cavity and performs a critical position in respiration. If you inhale, the diaphragm contracts and flattens, letting your lungs to