Heart Chambers are the four main spaces inside the heart that receive and pump blood. They are called the right atrium, right ventricle, left atrium, and left ventricle. Clinicians reference Heart Chambers when describing blood flow, heart function, and many heart conditions. They are assessed in routine exams and in common tests such as echocardiography (heart ultrasound).
The Inferior articular process is a bony projection on the back part of a spinal vertebra. It forms the lower half of a paired joint called a facet (zygapophyseal) joint. Facet joints help guide and limit spinal motion while sharing load with discs and ligaments. Clinicians most often discuss the Inferior articular process when evaluating facet-related pain, instability, or narrowing around spinal nerves.
The Pericardial Sac is the thin, protective “bag” that surrounds the heart. It sits in the middle of the chest and helps the heart move smoothly as it beats. Clinicians refer to it often in imaging and when evaluating chest pain, shortness of breath, or low blood pressure. It is also important in cardiac surgery because it is closely attached to nearby structures.
The Superior articular process is a bony projection on each vertebra in the spine. It helps form the facet (zygapophyseal) joints that guide and limit spinal motion. Clinicians commonly discuss it in spine imaging reports, anatomy education, and surgical planning. It is also relevant when evaluating facet-joint arthritis, spinal stenosis, and nerve compression.
The Pericardial Space is the thin, fluid-lubricated space around the heart. It sits between two layers of the pericardium, the sac that surrounds the heart. Clinicians reference it when evaluating fluid around the heart and when accessing the outside surface of the heart for certain procedures.
Articular process is a bony projection on a vertebra (a spinal bone). It helps form the facet joints, which guide and limit spine motion. Clinicians use the term when describing anatomy on imaging, injury patterns, and arthritis. It also comes up when planning or targeting spine procedures around the facet joints.
Pericardium is the thin, sac-like structure that surrounds the heart and the roots of the great vessels. In plain terms, it is the heart’s outer “protective covering,” with a small amount of lubricating fluid inside. It is commonly referenced in cardiology when evaluating chest pain, shortness of breath, or fluid around the heart. It is also discussed in cardiothoracic surgery because pericardial tissue can be used for repairs or prosthetic devices.
Pars interarticularis is a small bony segment of a vertebra in the spine. It sits between key joints of the vertebra and helps transmit forces during movement. Clinicians often discuss Pars interarticularis when evaluating back pain, spinal stability, and stress fractures. It is also used as an anatomical landmark in imaging reports and surgical planning.
Lamina is a bony plate that forms part of the back wall of each vertebra in the spine. It helps create the spinal canal that protects the spinal cord and nerve roots. Lamina is commonly discussed in spine imaging reports and in surgeries such as laminectomy or laminoplasty. It is also relevant in fractures, tumors, infections, and degenerative narrowing of the spinal canal.
Epicardium is the thin outer layer of the heart wall. It lies directly on the heart muscle (myocardium) and is also called the visceral layer of the pericardium. Epicardium helps provide a smooth, low-friction surface as the heart beats. Clinicians commonly reference the Epicardium in imaging, heart surgery, and certain rhythm procedures.