Epithelium of the eye The stomach is internally lined by the gastric mucosa, the innermost layer of which forms a single-layered, highly prismatic epithelium. This means that the epithelial cells have an elongated shape. The individual cells are connected to each other by special connections, so-called tight junctions. The epithelium and the adjacent layers form … Epithelium of the eye | Epithelium
Epithelium of the skin The skin (epidermis) is separated from the outside by a multi-layered cornified squamous epithelium. This provides mechanical protection, prevents the penetration of bacteria and prevents the body from drying out. It is called squamous epithelium because the uppermost cell layer consists of flat cells. Since these cells die constantly, turn into … Epithelium of the skin | Epithelium
Carcinomas Carcinomas, i.e. malignant tumors, can also develop in epithelia. Here there are different types, which arise from different types of epithelium. They must be distinguished from the so-called adenomas, which are benign tumors of glands of the epithelium. Papillomas are also benign epithelial growths.A carcinoma can develop from squamous epithelium, then one speaks of … Carcinomas | Epithelium
What is mitosis? Mitosis describes the process of cell division. Cell division begins with the doubling of DNA and ends with the strangulation of the new cell. Thus, two identical daughter cells are formed from a mother cell, which contain the same genetic information. During the entire mitosis process, both the mother cell and the … Mitosis – Simply explained!
What are the stages of mitosis? The cell cycle, which is responsible for cell division and thus also for cell proliferation, can be divided into interphase and mitosis. In interphase, the DNA is doubled and the cell is prepared for the upcoming mitosis. This phase of the cell cycle can be of varying length and … What are the stages of mitosis? | Mitosis – Simply explained!
Duration of mitosis Mitosis lasts on average about one hour, so that one can speak of rapid cell division. Compared to interphase, mitosis takes relatively little time. In addition, the interphase can last from several hours to several months or even years, depending on the cell type. The G1 – and the G0-phase in the … Duration of mitosis | Mitosis – Simply explained!
What is the difference between mitosis and meiosis? Both mitosis and meiosis are responsible for nuclear divisions, although both processes differ in their sequence and results. Mitosis is the process by which two identical daughter cells with a double (diploid) set of chromosomes are formed from a mother cell. In contrast to meiosis, only one … What is the difference between mitosis and meiosis? | Mitosis – Simply explained!
Definition Cells are the smallest, coherent units from which organs and tissues are built. Each cell is surrounded by a cell membrane, a barrier consisting of a special double layer of fat particles, the so-called lipid double layer. Lipid bilayers can be imagined as two fat films lying on top of each other, which cannot … Cell membrane
Structure of the cell membrane Cell membranes separate different areas from each other. To do this, they have to meet many different requirements: First of all, cell membranes are made up of a double layer of two fat films, which in turn are composed of individual fatty acids. The fatty acids consist of a water-soluble, … Structure of the cell membrane | Cell membrane
What are the components of the cell membrane? Basically, the cell membrane is composed of a phospholipid bilayer. Phospholipids are building blocks consisting of a water-loving, i.e. hydrophilic, head and a tail formed by 2 fatty acids. The part consisting of fatty acids is hydrophobic, which means that it repels water. In the bilayer of … What are the components of the cell membrane? | Cell membrane
Functions of the cell membrane As the complex structure of cell membranes already suggests, they have many different functions to fulfil, which can vary greatly depending on the type and localisation of the cell. On the one hand, membranes generally represent a barrier. A function that should not be underestimated. In our body, countless reactions … Functions of the cell membrane | Cell membrane
Differences to the cell membrane of bacteria – Penicillin The cell membrane of bacteria is hardly different from that of the human body. The big difference between the cells is the additional cell wall of the bacteria. The cell wall attaches itself outside the cell membrane and in this way stabilizes and protects the bacterium, … Differences to the cell membrane of bacteria – Penicillin | Cell membrane
