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.
Sometimes a breakout of hives has nothing to do with allergies. 1  Other causes include: 2  infections, including colds. 3  exercise. 4  anxiety or stress. 5  exposure to the sun. 6  exposure to cold, such as from diving into a cold pool. 7  contact with chemicals. 8  scratching.