1 A nuclear envelope reforms around each chromosome set, the spindle disappears, and cytokinesis follows. 2  In animal cells, cytokinesis involves the formation of a cleavage furrow, resulting in the pinching of the cell into two cells.
Urticaria (Hives) Itchy, raised red areas on the skin. Hives are caused by a reaction to certain foods, drugs, infections, or emotional stress. Also called urticaria.
Cold hives are caused by your body's immune system perceiving the cold temperature around you as something foreign that must be fought off with histamines that are released into your blood stream. These histamines cause hives to appear, usually where the exposure took place.