Several types of cells in the immune system engulf microorganisms via phagocytosis. 1  Neutrophils. 2  Neutrophils are abundant in the blood, quickly enter tissues, and phagocytize pathogens in acute inflammation. 3  Macrophages. 4  Macrophages are closely related to monocytes in the blood.
Snowfall in Flagstaff ranged from 5 inches to 9 inches, with 8.6 inches at Flagstaff Pulliam Airport. Official record-keeping on Flagstaff's weather began on September 9, 1898, and a 30-year period ending in 2000 has been used in the last decade to determine what is average weather-wise.
In December, for instance, one in four years totals over 10.8 inches of snow. Another 25 percent of years receive less than 2.6 inches for the month. Similarly in January, fresh snowfall in the heaviest years amounts to over 12.8 inches, while the lightest years get less than 3.2 inches. New snow for February ranges from over 9.3 inches in heavy snowfall years to under 2.6 inches in light years.