The visceral or pulmonary pleura covers the outside of the lungs, and the parietal or costal pleura lines the inside of the chest wall, and it extends over the top of diaphragm.

脏层胸膜或肺胸膜覆盖肺的外部，壁层胸膜或肋胸膜排列在胸壁的内部，并延伸到横膈膜的顶部。