It is usually dirt and sebum that is trapped in a pore. It's an accumulation of oily materical produced by sebaceous glands. The way to prevent them is to wash the affected area thoroughly and cleanse with an antibacterial cleanser.
sebaceous glands
A comedone is commonly known as a blackhead or whitehead.
The objects/bodies which do not produces(emits) light on their own are known as non-luminous material. For ex- moon
Soil typically has distinct layers, or horizons, that are created by the weathering of rock and the accumulation of organic matter. The top layer, known as the O horizon, is rich in organic material. Below that is the A horizon, or topsoil, which contains a mix of organic material and minerals. The B horizon, or subsoil, is characterized by the accumulation of minerals leached from the upper layers. Finally, the C horizon consists of partially weathered rock material.
obesity
ascites
Black seeds do not grow in your pores. It is simply dirt, known as a blackhead. You need to wash more thoroughly.
Burning typically produces thermal energy, also known as heat energy. This process involves the conversion of stored chemical energy in a material into heat and light energy as the material combusts and reacts with oxygen.
accumulation of excess liquid in tissues
The type of organism is a fungus, Aspergillus flavus. The toxic substance it produces is called an aflatoxin. Aflatoxins are known carcinogens that can lead to changes in the genetic material of cells, particularly liver cells.
Canon produces very high quality laser printers. These printers are known for their durability and the high quality of the printed material.
AL2O3 + Fe and/or Ti The basic material of sapphire is known as corundrum - a colorless material formed from aluminum oxide. It is the addition of Titanium and Iron during the formation of the sapphire crystals that produces the beautiful blue of this corundrum variety.