The muscle that separates the chest from the abdomen and forms the floor of the thorax is called the diaphragm.
There could be many answers!But I think you are referring to the DIAPHRAGM (the main muscle of breathing) which separates the THORAX (your 'chest') from your ABDOMEN (your 'stomach' area)
It is the thoracic diaphragm.
The diaphragm separates the chest from the abdomen and pelvis
The diaphragm is the muscle separating the abdomen from the chest
That's an oddly worded question... but the abdomen is a part of the thorax. Your abdomen is the lower half of your thorax, your chest is the upper half. Our stomachs are roughly in the middle.
the diaphragm is the muscle separating the chest and the abdomen
Hernia, hiatus: Protrusion of the stomach up into the opening normally occupied by the esophagus in the diaphragm, the great dome of muscle that separates the thoracic (chest) cavity from the abdomen.
Hiatal hernia is a condition in which a portion of the stomach protrudes upward into the chest, through an opening in the diaphragm. The diaphragm is the sheet of muscle that separates the chest from the abdomen. It is used in breathing.
Insects have body parts just like humans do. The thorax of an insect is like the chest. On the thorax are the insect's head, legs, wings, leading to its abdomen. The abdomen is the stomach, and it also contains the insect's genitals (like humans, insects can be male or female).
Diaphragm which is the most important muscle for breathing, separates lungs from abdomen
We describe an insect's body as head, thorax and abdomen. That means something like "head, chest and belly".In much the same way as humans, crocodiles, and dogs are built, the chest or "thorax" of an insect is between the belly and the head.In fact, the word "thorax" applies to the human body as well; we speak of thoracic surgery, the thoracic cavity, and thoracic vertebrae for example.
That would be the head,thorax/chest and abdomen.