Lead flashing was commonly used on chimneys, around other roof penetrations such as vent pipes, and roof junctions, such as valleys. It is still used for this, but is less common because of its cost, and the availability of alternatives. Modern alternatives: pvc, butyl rubber etc. are often less durable.
Granulocytes, specifically neutrophils, help the body fight bacterial infections. The number of granulocytes in the body usually increases when there is a serious infection. People with a lower number of granulocytes are more likely to develop bad infections more often.
The three types of granulocytes are neutrophils, eosinophils, and basophils. They are formed in red bone marrow in vertebrates. Neutrophils are the most numerous white blood cells and contain the nuclei with one to five lobes. The main function of neutrophil is to destroy pathogens by phagocytosis.