Your question is not clear, but the diaphragm is the muscle that divided the abdomen from the thorax (the chest cavity from the abdominal cavity). Ventral is term that is used mostly in veterinary medicine and it refers to the side of the body that has the belly button.
The brain and the spinal cavity are located in the dorsal body cavity.
The abdominal cavity is not part of the dorsal cavity. It is located in the ventral cavity, along with the thoracic and pelvic cavities.
The body cavity bounded by the ribs is the thoracic cavity. It contains the heart, lungs, and other structures involved in breathing and circulation.
The least protective body cavity is the nasal cavity, as it is lined with delicate mucous membranes that can be easily damaged.
catheter
The embalming fluids used in the arteries and body cavity are essentially the same. The difference is the body fluid is slightly more acidic than the arterial fluid. It is also sometimes scented.
Catheter (Greek: to let down) is a flexible sterile tube inserted into a body cavity to introduce or withdraw fluid. Examples: intravenous catheter - can be used to withdraw blood or infuse medication/fluids. urethral catheter - tube inserted into the bladder to drain urine. cardiac catheter - visualization and treatment of coronary problems. toposcopic catheter - delivers chemotherapy to specific sites.
A syringe needle is a hollow metal tube with a sharp, pointed tip used to inject or withdraw fluids from the body. It attaches to the syringe to enable precise delivery or extraction of liquids in medical procedures such as vaccinations, blood draws, or injecting medication.
To remove fluid by suction with a needle is aspiration, which can be done through a centesis, which is a puncture of a body cavity.
A "false body cavity" is a term used to describe a body structure that appears to be a cavity, but is not a true anatomical cavity. This can happen when two tissues or organs are separated by a space that is not a typical body cavity. It can also refer to an artificial or pathological space that resembles a normal body cavity.
The body fluids shift out of the blood vessels and into the interstitial space. These fluids are used for re-hydration.
The spinal cavity is involved in lumbar surgery.
There are several advantages to having a coelom, or body cavity. The organs are enclosed, there is independent movement of the body wall, there is more space for organs, and there is a storage area for sperm and eggs. It also has fluids that protect organs and provide nutrients.
Your question is not clear, but the diaphragm is the muscle that divided the abdomen from the thorax (the chest cavity from the abdominal cavity). Ventral is term that is used mostly in veterinary medicine and it refers to the side of the body that has the belly button.
The brain and the spinal cavity are located in the dorsal body cavity.
Pisces or fish have true internal body cavity.