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.
(1866-1943). The English author and illustrator Beatrix Potter created Peter Rabbit, Jeremy Fisher, Jemima Puddle-Duck, Mrs. Tiggy-Winkle, and other popular animal characters. Her Tale of Peter Rabbit, first published privately in 1901, went on to become the best-selling childrenâs book of all time.