Question

7. What lines internal cavities that have no external opening to the body?

O Mediastinum
O Pericardium
O Mucus membranes
light 9
O Serous membranes

Answer 1

Serous membranes do not have an external opening to the body

Step-by-step explanation:

Serous membranes line internal cavities that have no external opening in the body. For example, the thoracic and abdominopelvic cavities have serous membranes. Serous membranes secrete serous fluid that lubricates the cavities and organs.