They contain carbon, hydrogen, oxygen and nitrogen and usually sulfur, occasionally phosphorus. Proteins form a large and essential part of the body mass, comprising especially cell membranes, connective tissue, muscles, enzymes, hormones, blood proteins. To maintain this mass the diet must contain a high proportion of protein, especially in growing animals and those recovering from debilitating diseases.
Russian composer Sergei Prokofiev wrote Peter and the Wolf in 1936 after returning to Moscow following a 19-year, self-imposed exile. It is a children's musical story that teaches about the orchestra by introducing various characters portrayed by seven themes played on either solo instruments or groups of instruments.
notable works. Beatrix Potter, in full Helen Beatrix Potter (born July 28, 1866, South Kensington, Middlesex [now in Greater London], Englandâdied December 22, 1943, Sawrey, Lancashire [now in Cumbria]), English author of childrenâs books, who created Peter Rabbit, Jeremy Fisher, Jemima Puddle-Duck, Mrs. Tiggy-Winkle, and other animal characters.