<unk> i are classified into two major groups depending on their location and the relative amount of platelets and red blood cells (RBCs). The two major groups are: # Arterial or white<unk> i (characterized by predominance of platelets) # Venous or red<unk> i (characterized by predominance of red blood cells). Microclots In the microcirculation consisting of the very small and smallest blood vessels the capillaries, tiny<unk> i known as microclots can obstruct the flow of blood in the capillaries. This can cause a number of problems particularly affecting the alveoli in the lungs of the respiratory system resulting from reduced oxygen supply. Microclots have been found to be a characteristic feature in severe cases of COVID-19, and in long COVID. Mural<unk> i Mural<unk> i are<unk> i that adhere to the wall of a large blood vessel or heart chamber. They are most commonly found in the aorta, the largest artery in the body, more often in the descending aorta, and less often in the aortic arch or abdominal aorta. They can restrict blood flow but usually do not block it entirely. Mural<unk> i are not usually found in vessels already damaged by atherosclerosis. A mural<unk>  can affect any heart chamber. When found in the left ventricle it is often a result of a heart attack complication. The<unk>  in this case can separate from the chamber, be carried through arteries and block a blood vessel. They appear grey-red with alternating light and dark lines (known as lines of Zahn) which represent bands of white blood cells and red blood cells (darker) entrapped in layers of fibrin.
Thrombus
Thrombosis
Abscess
Enema
Thrombocythemia
Platelet plug
Embolus
Hernia