The heart is located in the mediastinal cavity or the mediastinum.
Fossa is an anatomic cavity; caries is a dental cavity.
Sinus
The thoracic cavity or thorax is the medical term for the chest cavity.
Mediastium (in the middle) is the center area of the thoracic (chest) cavity where the heart resides. On either side you will find the pleura (side) which houses the right and left lungs.
Usually people refer to a septal defect, often a ventricular septal defect, when they speak of a "hole in the heart." They may also mean an atrial septal defect or patent foramen ovale.
Endocardial means within the heart.
Catheterization is the medical term meaning insertion of a tube into a duct or cavity.
The lung cavity is called the pleural cavity.
Pelvic
Meatotomy is the medical term meaning surgical incision into a meatus, or opening into a body cavity.
uterine agenesis
synovial cavity
Effusion is the medical term meaning escape of fluid into a body cavity. So, for instance, escape of fluid into the pleural space is pleural effusion.
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The hilum is the region of lymph tissue in the chest cavity.
Abscess
The cavity that you are referring to is know as the thoracic cavity.The ventral body cavity contains the organs in the chest and abdomen.Thoracic cavity
abscess