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 two ph?n:The phrenic nerve originates within the cervical spinal roots C3, C4, and C5, and it truly is important for initiating the respiration method. This nerve serves both equally motor functions for diaphragm contraction and