It circulates in closed blood vessels in the system. When blood is given to a pathological lab for routine check up of blood CBC - a complete blood count is performed. Differential WBC count .
Platelets count .
Abnormalities of erythrocytes . Abnormalities of leucocytes . It means stretching of body tissue due to the accumulation of gas or air in the tissue or organ. Pulmonary emphysema is a chronic lung disease in which air sacs of the lungs are stretched until the elastic fibers in them are destroyed. It is an excess of red blood cells.