Golgi apparatus: Definition, Function, structure.
Golgi apparatus is also known as the Golgi complex, Golgi bodies, and Golgiosome, in plant cell and lower invertebrates is usually referred to as Golgi …
Endoplasmic reticulum (Rough and Smooth)
The endoplasmic reticulum (ER) is a network of membrane-enclosed tubules and sacs (cisternae) that extends from the nuclear membrane throughout the cytoplasm. The entire endoplasmic …
Cell membrane (Plasma Membrane): Structure, Function
What is Cell Membrane? Cell membrane is also known as Plasma Membrane, Cytoplasmic Membrane and historically referred to as the Plasmalemma. Plasma membrane encloses every …
Read moreCell membrane (Plasma Membrane): Structure, Function
Cytosol: Definition, Nature, Properties, and Function.
What is Cytosol? The cytosol is a semi-fluid or gel-like liquid matrix of cells that exist outside the organelles and inside the cell membrane. It …
Read moreCytosol: Definition, Nature, Properties, and Function.
Cell Structure: Organelles and Function
Ideas about cell structure have changed considerably over the years. Early biologists saw cells as simple membranous sacs containing fluid and a few floating particles. …
Eukaryotic cell: Definition, Size, Shape, and Structure.
A eukaryotic cell or organism is that possesses a clearly defined nucleus. The eukaryotic cells are the true cells that occur in the plants (from …
Read moreEukaryotic cell: Definition, Size, Shape, and Structure.
What is Cell Theory?
In 1838, a German botanist Mathias Jacob Schleiden (1804—1881) put forth the idea that cells were the units of a structure in the plants. In …
What is cell biology?
Definition of cell biology The biological science which deals with the study of structure, function, molecular organization, growth, reproduction, and genetics of the cells, is …
What is CD8+ T Cells?
CD8+ (cytotoxic) T cells, like CD4+ Helper T cells, are generated in the thymus and express the T-cell receptor. However, rather than the CD4 molecule, …
What is T Helper Cell (CD4+ Cell)?
Helper T cell, also called CD4+ cell, T helper cell, or helper T lymphocyte, type of white blood cell that serves as a key mediator …