A pattern, apart from the term's use to mean template, is a discernible regularity in the world or in a manmade design. As such, the elements of a pattern repeat in a predictable manner. A geometric pattern is a kind of pattern formed of geometric shapes and typically repeated like a wallpaper.
The vena cava is the major vein that returns blood to the right atrium of the heart. The vena cava superior returns blood from the head, neck, upper extremities, and chest. The vena cava inferior returns blood from the lower extremities, the pelvis, and the abdomen.
Clots in Veins: Blood clots which form in the deep veins of the body lead to deep. vein thrombosis (DVT) and pulmonary embolism (PE). When a clot forms in the. deep veins of the body, it is called deep vein thrombosis, often referred to as DVT. for short.