Structure

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Cell Structure Cytoplasm
April 3, 2015

Cell Structure Cytoplasm

Cytoplasm is the fluid that fills a cell. Scientists used to call the fluid protoplasm. Early on, they didn t know about the many different types of fluids in the cell. There is special fluid in the mitochondria, endoplasmic reticulum, Golgi apparatus, and nucleus. The only two plasms left are cytoplasm (the fluid in the cell also called cytosol) and nucleoplasm…

Cell Structure of Archaea
July 26, 2016

Cell Structure of Archaea

Archaea are tiny, usually less than one micron long (one one-thousandth of a millimeter). Even under a high-power light microscope, the largest archaeans look like tiny dots. Fortunately, the electron microscope can magnify even these tiny microbes enough to distinguish their physical features. You can see archaean images below, made using a variety of micrographic…

Shape and Structure of Bacteria
December 15, 2016

Shape and Structure of Bacteria

Although bacterial cells are much smaller and simpler in structure than eukaryotic cells, the bacteria are an exceedingly diverse group of organisms that differ in size, shape, , and metabolism. Much of the knowledge about bacteria has come from studies of disease-causing bacteria, which are more readily isolated in and more easily investigated than are many…

Cellular Structure of Bacteria
October 5, 2014

Cellular Structure of Bacteria

Biological cells are the basic units of life i.e. the smallest units that can be alive. There are many types of biological cells. Classification of Biological Cells: Biological taxonomy is the identification and naming of species and the arrangement of them into biological classes (i.e. groups). A taxonomic rank is a level in a taxonomic hierarchy, of which…

Cytoplasm Structure
July 1, 2017

Cytoplasm Structure

Cytoplasm is the semi-fluid substance of a cell that is present within the cellular membrane and surrounds the nuclear membrane. It is sometimes described as the nonnuclear content of the protoplasm. All the cellular contents in a prokaryote organisms are contained within cell s cytoplasm. In eukaryote organisms, the nucleus of the cell is separated from the…

Cells and Their Structures
June 15, 2017

Cells and Their Structures

Cells were first described by Robert Hooke in his book Micrographia, published in 1665. Using a microscope, he described the structure of cork as closely resembling prison chambers or monks’ quarters (there is some debate about this). He used the term “cell” to describe these hollow chambers. The Cell Theory was first described in 1839. While the Cell Theory…