Multiple choice

The muscular floor of chest cavity is called _____________.

  1. spiracle

  2. trachea

  3. diaphragm

  4. rib

  5. thoracic cavity

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The diaphragm is the dome-shaped sheet of muscle that separates the chest from the abdomen. It is also referred to the thoracic diaphragm because it is located in the thoracic cavity, or chest.