Question

A large muscular sheet called
forms the floor of the chest cavity.​

Answer 1

Answer:

diaphragm

diaphragmThe diaphragm is the large muscular sheet which forms the floor of the chest cavity.

Answer 2

$\huge{\mathrm{\underline{\underline{Diaphragm}}}}$

The diaphragm is a C-shaped structure of muscle and fibrous tissue that separates the thoracic cavity from the abdomen. The dome curves upwards. The superior surface of the dome forms the floor of the thoracic cavity, and the inferior surface the roof of the abdominal cavity.