Inferior Vena Cava is the body’s largest vein that carries blood from the lower half of the body back to the heart. It runs through the abdomen and enters the right side of the heart (the right atrium). Clinicians often refer to it in imaging, ultrasound exams, and procedures involving venous access. It is also central to discussions about blood clots and venous return (blood flowing back to the heart).
The Superior Vena Cava is a large vein that returns blood from the upper body to the heart. It carries oxygen-poor blood from the head, neck, arms, and upper chest into the right atrium. Clinicians reference it often in imaging, central venous access, cardiac devices, and evaluation of chest symptoms. It also matters in conditions that block venous flow, such as Superior Vena Cava obstruction (often discussed as “SVC syndrome”).
The Atlanto-occipital joint is the connection between the base of the skull and the first cervical vertebra (C1, the atlas). It helps you nod your head “yes” and keeps the head balanced on the neck. Clinicians refer to it when evaluating upper-neck pain, headache patterns, and craniocervical stability. It is also a key landmark in imaging and in some diagnostic or surgical decision-making.
The Coccyx is the small, tail-like bone at the very bottom of the spine. It sits below the sacrum and forms part of the pelvic ring. In everyday language, it is often called the “tailbone.” Clinically, it is discussed in back pain, pelvic pain, and sitting-related pain evaluations.
Pulmonary Veins are blood vessels that carry oxygen-rich blood from the lungs to the heart. They connect the lungs to the left atrium, which is the heart’s receiving chamber on the left side. Clinicians refer to Pulmonary Veins in heart rhythm care, imaging reports, and congenital heart evaluations. They are also discussed when symptoms suggest lung-to-heart blood flow problems.
The Sacrum is a triangular bone at the base of the spine, between the two hip bones. It forms the back wall of the pelvis and connects the spine to the pelvis. Clinicians use the term Sacrum when discussing anatomy, imaging findings, pain sources, and procedures near the lumbosacral region. It is commonly referenced in low back pain, pelvic pain, and sacroiliac (SI) joint evaluations.
The Pulmonary Trunk is the large blood vessel that carries blood from the right side of the heart to the lungs. It starts at the right ventricle, just beyond the pulmonary valve. It quickly divides into the right and left pulmonary arteries, one going to each lung. Clinicians commonly refer to it during heart and lung imaging, hemodynamic testing, and congenital heart evaluations.
The Lumbar spine is the lower part of the spine in the lower back. It sits between the rib-bearing thoracic spine and the pelvis (sacrum). It supports body weight and allows bending, twisting, and lifting. It is a common focus in back pain evaluation, imaging, and spine care.
The Pulmonary Artery is the large blood vessel that carries blood from the right side of the heart to the lungs. It starts at the right ventricle and then divides to supply the right and left lungs. Clinicians commonly reference it when discussing oxygenation, lung circulation, and right-heart function.
The Thoracic spine is the mid-back portion of the spine between the neck and the low back. It is made of 12 vertebrae (T1–T12) that connect to the ribs and help form the rib cage. It protects the spinal cord and supports posture while allowing controlled movement. It is commonly discussed in spine clinics, imaging reports, and surgical planning for mid-back conditions.