Abby Jackson Â· Business Insider 01 Sep 2017. South Africa just saw its credit rating downgraded after two of the three major ratings agencies issued depressing assessments of the state of the countryâs economy.
Mastocytosis (say mass-toe-sigh-toe-sis) is the abnormal growth of mast cells in the body. Mast cells are part of the immune system, which helps protect your body against infection. The most common form of mastocytosis is when mast cells accumulate on the skin, causing reddish-brown spots or bumps.In rare cases, mastocytosis can affect other parts of the body, such as the stomach, the intestines and the bone marrow. Mastocytosis can occur in people of any age.he most common form of mastocytosis is when mast cells accumulate on the skin, causing reddish-brown spots or bumps. In rare cases, mastocytosis can affect other parts of the body, such as the stomach, the intestines and the bone marrow. Mastocytosis can occur in people of any age.
Endocytosis is the process of one cell engulfing another. The endocymbiotic theory suggests that one prokaryotic cell engulfed another, and instead of being digested, the engulfed cell remained intact and functional. The two cells then formed a symbiotic (mutually beneficial) relationship.