Neutrophils – Definition, structure, count, range, functions

Neutrophils - Definition, structure, count, range, functions

Neutrophils Definition Neutrophils are a type of white blood cell with multi-lobed nuclei and stainable cytoplasmic granules. These are the most abundant granulocytes, occupying about 40-60% of the total number of white blood cells in the blood. Neutrophils, like all other blood cells, are formed from the stem cells in the bone marrow. After differentiation … Read more Neutrophils – Definition, structure, count, range, functions

Metaphase in Mitosis and Meiosis (Metaphase 1 and 2)

Metaphase in Mitosis and Meiosis (Metaphase 1 and 2)

Metaphase definition Metaphase is a stage of the cell cycle occurring in both mitosis and meiosis cell division processes. During metaphase in mitosis and meiosis, the chromosomes condense and they become visible and distinguishable during alignment at the center of the dividing cell, to form a metaphase plate at the center of the cell. In … Read more Metaphase in Mitosis and Meiosis (Metaphase 1 and 2)

Prophase in mitosis and meiosis (Prophase 1 and 2)

Prophase in mitosis and meiosis (Prophase 1 and 2)

Prophase Definition Prophase is the phase that follows the interphase and typically the first and longest phase in the cell cycle, for both mitosis and meiosis. It is the phase of DNA unwinding and chromatin condensation to make the chromosomes visible. What Happens in Prophase? During prophase, the separation of the DNA that was synthesized … Read more Prophase in mitosis and meiosis (Prophase 1 and 2)

Interphase- definition, stages, cell cycle with diagram & video

The Stages of Interphase and the Cell Cycle

What is Interphase? Cells continuously undergo cell division through which daughters cells arise which mature and also produce their own daughter cells and the cycle continues. The events of the cell cycle involve cell growth and cell division, of which the interphase defines the phase of cell growth where several metabolic reactions take place. The … Read more Interphase- definition, stages, cell cycle with diagram & video

Osmosis- definition, types, examples, (Osmosis vs Diffusion)

Osmosis

Osmosis Definition Osmosis is a biophysical process occurring commonly in biological systems where solvent molecules move across a semi-permeable membrane towards a region of high solute concentration. Figure: Osmosis. Image Source: Open Stax (Rice University) and Biology Online. It is a type of passive transport and is directed towards the direction that tends to equalize … Read more Osmosis- definition, types, examples, (Osmosis vs Diffusion)

Pinocytosis- definition, steps, types, examples, (vs phagocytosis)

Pinocytosis and Phagocytosis

Pinocytosis definition Pinocytosis is a type of endocytosis in which small particles suspended in the extracellular fluid are moved into the cell through pores formed on the cell membrane. The term pinocytosis is formed of two words “pino” and cytosis” where ‘pino’ means “to drink” while ‘cytosis’ means relating to the cell. It is a … Read more Pinocytosis- definition, steps, types, examples, (vs phagocytosis)

Meiosis- definition, purpose, stages, applications with diagram

Meiosis- definition, purpose, stages, applications with diagram

Meiosis definition Meiosis is a type of cell division in sexually reproducing eukaryotes, resulting in four daughter cells (gametes), each of which has half the number of chromosomes as compared to the original diploid parent cell. The haploid cells become gametes, which by union with another haploid cell during fertilization defines sexual reproduction and formation … Read more Meiosis- definition, purpose, stages, applications with diagram

Mitosis- definition, purpose, stages, applications with diagram

Mitosis- definition, purpose, stages, applications with diagram

Mitosis definition Mitosis is the process of cell division in which one cell gives rise to two genetically identical daughter cells, resulting in cell duplication and reproduction. The number of chromosomes is preserved in both the daughter cells. Mitosis is a short period of chromosome condensation, segregation, and cytoplasmic division. The mitosis occurs in the … Read more Mitosis- definition, purpose, stages, applications with diagram

Epithelial Tissue – Definition, types, functions, examples

Epithelial Tissue Types

Epithelial Tissue definition Epithelial Tissue is one of the four types of tissue (epithelial, muscular, connective, and nervous) in animals which consists of closely aggregated polyhedral cells adhering firmly to one another, forming cellular sheets that line the interior of hollow organs and cover the body surface. An epithelial tissue or epithelium (plural is epithelia) … Read more Epithelial Tissue – Definition, types, functions, examples

Simple diffusion- definition, principle, examples, applications

Simple diffusion

Simple diffusion definition Simple diffusion is a type of passive transport which, as the name suggests, is simply the movement of solute which occurs when its electrochemical potentials on the two sides of a permeable barrier are different. While in other science disciplines like chemistry, diffusion refers to “spreading out” of molecules from a higher … Read more Simple diffusion- definition, principle, examples, applications

Facilitated Diffusion- definition, principle, factors, examples

Facilitated Diffusion

Facilitated diffusion definition Facilitated diffusion is the process of biological transport in which specific structural components of biological membranes interact with particular solutes or classes of solutes, markedly increasing the rates at which they can cross the membrane. It is a passive-mediated transport in which particles or substances are transported across a biological membrane from … Read more Facilitated Diffusion- definition, principle, factors, examples

Cell Organelles- Structure and Functions with labeled diagram

Cell Organelles- Structure and Functions with diagram

Cell Organelles definition Cell organelle is a specialized entity present inside a particular type of cell that performs a specific function. There are various cell organelles, out if which, some are common in most types of cells like cell membranes, nucleus, and cytoplasm. However, some organelles are specific to one particular type of cell-like plastids … Read more Cell Organelles- Structure and Functions with labeled diagram