The skin is the largest organ of the human body. In the average adult it covers about 3000 square inches and weighs around six pounds, which is nearly twice the weight of the human brain or liver. The skin receives about one third of the blood that circulates through the body. It’s rugged, flexible and ...
Bacteria are so tiny; they can only be seen under a microscope. Bacteria are one celled tiny microorganisms. Most people are unaware that most bacteria are harmless. Harmless bacteria are called nonpathogenic bacteria, while a bacterium that is harmful is called pathogenic. Nonpathogenic or harmless bacteria make up over 70 percent of all bacteria. Bacteria ...
The epidermis forms the outer layer of skin and is composed of keratinized stratified squamous epithelium. This outer layer is a tough waterproof barrier that protects the organs interior to the epidermis from external forces and conditions. The epidermis is thin in some locations, but is much thicker in other areas, such as the palms ...
Eukaryotic cells are found in every domain with the exception of the Bacteria and Archea domain. Eukaryotic cells differ from prokaryotic cells in two major ways; size, and the presence of a membrane surrounding the nucleus, and other organelles. Because eukaryotic cells are so much larger than prokaryotic cells (roughly ten times larger) it becomes ...
Most people know that living organisms increase in size through cell division. Cell division is a term referred to how cells in the body are constantly involved in a series of replication and divisions of the existing cells to make new cells because cells, like organisms, do not live forever. The old cells are replaced ...
Mitosis is the process of cell division that results in two cells identical to the original parent cell. Mitosis is made up of multiple stages that are characterized by the position of the chromosomes inside the cells. Interphase is the stage the cell is in when it is not undergoing mitosis. The cell undergoes normal ...