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A septum, in Latin meaning "something that encloses", is a partition separating two cavities or two spaces containing a less dense material, such as the septum nasi between the nostrils or the septa separating each siphuncle, or chamber, in the shells of nautiloids, ammonites, and belemnites—all cephalopods that retained their external shell. Wikipedia does not have an article with this exact name. ... Wiktionary is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... The septum nasi is actually the central bone in the nose, separating the two nostrils. ... Septa (sing. ...

Histology

Histological septa are seen throughout most tissues of the body, particularly where they are needed to stiffen a soft cellular tissue, and they also provide planes of ingress for small blood vessels. Because the dense collagen fibres of a septum usually extend out into the softer adjacent tissues, microscopic fibrous septa are less clearly defined than the macroscopic types of septa listed above. In rare instances, a septum is a cross-wall.

Chemistry

In chemistry and other experimental sciences, septa are rubber stoppers which are used to seal flasks or bottles. They are designed to be pierced by a needle or cannula which allows fluids to be transferred. Septa are often used together with Schlenk flasks and Schlenk lines to handle oxygen- or moisture-sensitive materials. A cannula (pl. ... An selection of Schlenk flasks and a Schlenk tube (bottom right) A Schlenk flask, or Schlenk tube is a reaction vessel typically used in air sensitive chemistry, invented by Wilhelm Schlenk. ... Vacuum gas manifold set up: 1 inert gas in, 2 inert gas out (to bubbler), 3 vacuum (To cold traps) 4 reaction line, 5 Teflon tap to gas, 6 Teflon tap to vacuum Vacuum gas manifold set up: 1 inert gas in, 2 inert gas out (to bubbler), 3 vacuum...

Particle accelerators

Septum magneta and electrostatic septum are two types of septa that can deflect an ejected beam while not affecting the orbiting beam. These devices are used with a circular particle beam accelerator to inject or eject a beam of particles to or from an accelerator.