What are rosettes in cells?
Rosettes are round assemblage of cells found in tumors. They usually consist of cells in a spoke circle, a halo collection surrounding a central or a cellular lumen. Rosettes are so named for their similarity to the rose casement found in gothic cathedrals.
What is a pseudo rosette?
A pseudorosette is a perivascular radial arrangement of neoplastic cells around a small blood vessel.
What is rosette in space?
The Rosette Nebula sits in the Milky Way about 5,000 light-years from Earth. Massive stars at its core have blasted a hole in the cloud of material with radiation and flows of charged gas particles, called stellar wind.
What is the meaning of Rosette Nebula?
The Rosette Nebula (also known as Caldwell 49) is an H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula’s matter.
How are rosettes formed?
The in vitro formation of clusters consisting of a cell (usually a lymphocyte) surrounded by antigenic cells or antigen–bearing particles (usually erythrocytes, which may or may not be coated with antibody or antibody and complement).
What is nuclear palisading?
Nuclear palisading is a characteristic feature which is typically seen in neural tumours such as neurilemmoma, and also in some other tumours. We report here three patients with basal cell carcinoma who showed histological patterns similar to nuclear palisading.
Why is Rosette Nebula Red?
Explanation: The Rosette Nebula is a large emission nebula located 3000 light-years away. The great abundance of hydrogen gas gives NGC 2237 its red color in most photographs.
Is the Rosette Nebula real?
The beautiful Rosette Nebula, aka NGC 2237, lies about 5,200 light-years from Earth in the constellation Monoceros the Unicorn, and is about 130 light-years across. It is an emission nebula, meaning that the gases that compose it glow as they are energized by radiation from local stars.
How was the Rosette Nebula formed?
CFHT’s MegaPrime Press Release – Astronomical Images – The Rosette nebula, a Star Forming Region. Scientific description: The Rosette Nebula is a huge cloud of glowing gas heated by stars created only a few million years ago when a giant molecular cloud collapsed.
How does the protostar form in the Solar System?
Accretion disk: The matter around the center spins up and flattens into a disk, while heat vaporizes the dust. Protostar: Forms in the center, when the core becomes opaque; later will become the Sun. (The gas orbiting the protostar in some cases may start to compress under its own gravity, producing a double star.)
Are there any remnants of the formation of the Solar System?
As we have seen, the comets, asteroids, and meteorites are surviving remnants from the processes that formed the solar system. The planets, moons, and the Sun, of course, also are the products of the formation process, although the material in them has undergone a wide range of changes.
What is the chemical pattern of the Solar System?
As we saw in Other Worlds: An Introduction to the Solar System, this general chemical pattern can be interpreted as a temperature sequence: hot near the Sun and cooler as we move outward. The inner parts of the system are generally missing those materials that could not condense (form a solid) at the high temperatures found near the Sun.
How is the Solar System formed according to the nebular hypothesis?
The nebular hypothesis says that the Solar System formed from the gravitational collapse of a fragment of a giant cold molecular cloud is impacted by solar winds carrying particles become magnetically charged.