Tuba section in a British style brass band. Tubas are found in various pitches, most commonly in F, E â­ , C, or B â­ . The main tube of a B â­ tuba is approximately 18 feet (5.5 m) long, while that of a C tuba is 16 feet (4.9 m), of an E â­ tuba 13 feet (4.0 m), and of an F tuba 12 feet (3.7 m). The instrument has a conical bore, meaning the bore diameter increases as a function of the tubing length from the mouthpiece to the bell.
The total body water is divided into intracellular and extracellular fluids. Plasma is considered __.
The wall of stomach, like the other parts of the gastrointestinal tract, consists of four layers : Mucosa, Submucosa, Muscularis, Serosa. The mucosa of stomach is divided in three layers. They are : The surface epithelium : surface epithelium contains gastric pits and gastric glands. Gastric pits are invagination of epithelium into lamina propria (second layer of mucosa). Gastric glands produce enzymes, HCl (hydrochloric acid) and gastric hormones.