The sternal part lowers the costal cartilages, facilitating inhalation by increasing the upper body cavity.Màng b?m là b? ph?n ti?p xúc tr?c ti?p v?i dung d?ch, l?i ph?i dao ??ng qua l?i liên t?c, l?p ?i l?p l?i su?t one chu kì, nên ch?t l??ng c?a màng b?m r?t ???c quan tâm.Lymphatic vessels through the diaphragm collect lymph and transport