Trapezius
trapezius
The coxa are inferior to the thorax. Both are bony, and can be described as neither superficial nor deep in relation to each other.
The section of the body behind an insect's thorax is called the abdomen
abdomen
It is behind (posterior to) the breastbone (sternum) in the chest (thorax).
Scalpula
Abdomen
The muscle that separates the chest from the abdomen and forms the floor of the thorax is called the diaphragm.
intercostal muscle
The deep muscle of the thorax that promote the inspiratory phase of breathing is the external intercostal. It is a muscle that originates from the lower border of a rib.
The muscle that separates the thorax and abdomen and aids in breathing is called the diaphragm. It is a dome-shaped muscle that contracts and relaxes to regulate the volume of the thoracic cavity, allowing for inhalation and exhalation.
This serosa covers the thorax cavity, the heart, and the lungs. It gives the lungs a libricant, allowing them to move easily over the thorax wall.