The sternal part lowers the costal cartilages, facilitating inhalation by expanding the upper body cavity.Structurally, the diaphragm is divided into its muscular peripheral areas and also the central aponeurotic component.Máy b?m màng th?y l?c ho?t ??ng t??ng t? nh? cách máy b?m d?ng c? h?c v?n hành, nh?ng ch?t l?ng s? ti?p xúc tr?c ti?p v?i