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.
Distance from Phoenix: 144 miles north; two-hour drive. Why it made our list: Flagstaff is home to Humphreys Peak, the highest point in AZ and one of the few places to ski or snowboard in the state. Yes, it snows in Arizona. The High Country gets about 110-inches of the white stuff each year.