The Medulla Oblongata's General Functions. Whereas the pons is located in the upper part of the brainstem, the medulla oblongata is a structure located in the lower half of the brainstem. Just because the medulla oblongata is beneath the pons, doesn't mean it's any less significant. In fact, they often work in tandem on issues such as breathing.
Cirrus are detached clouds in the form of white, delicate filaments or white or mostly white patches or narrow bands. These clouds have a fibrous (hair-like) appearance, or a silky sheen, or both. Cirrus clouds are composed almost exclusively of ice crystals. These crystals are in general very small, a fact, which together with their sparseness, accounts for the semi-transparency of most cirrus clouds.
The clouds can also be associated with very high surface winds which may indicate the presence of, or induce, winds and waves in the stratosphere. They form at temperatures of around minus 85ÂºC, colder than average lower stratophere temperatures, and are comprised of ice particles ~10Âµm across. The clouds must be composed of similar sized crystals to produce the characteristic bright iridescent colours by diffraction and interference.