From Wikipedia, the free encyclopedia. For the fungi genus, see Chalazion (fungus) . A chalazion (/kÉËleÉªziÉn/ ; plural chalazia /kÉËleÉªziÉ/), also known as a meibomian gland lipogranuloma, is a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland, usually on the upper eyelid.Chalazia differ from styes (hordeola) in that they are subacute and usually painless nodules.rom Wikipedia, the free encyclopedia. For the fungi genus, see Chalazion (fungus) . A chalazion (/kÉËleÉªziÉn/ ; plural chalazia /kÉËleÉªziÉ/), also known as a meibomian gland lipogranuloma, is a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland, usually on the upper eyelid.
The nucleus, chloroplast, and mitochondria have in common is that they are membrane-bound organelles in a cell.
Another difference is that ribosomes in prokaryotes are smaller than in eukaryotes. However, two organelles found in many eukaryotic cells, mitochondria and chloroplasts, contain ribosomes similar in size and makeup to those found in prokaryotes.This is one of many pieces of evidence that mitochondria and chloroplasts are themselves descended from free-living bacteria.owever, two organelles found in many eukaryotic cells, mitochondria and chloroplasts, contain ribosomes similar in size and makeup to those found in prokaryotes. This is one of many pieces of evidence that mitochondria and chloroplasts are themselves descended from free-living bacteria.