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Cell Biology

Cell biology or cytology is a branch of biology that deals with studies related to the structure and function of a cell-based on the concept that the cell is the fundamental unit of life.

  • A detailed study of the cellular structure and function provides a basis for studies related to tissues, organs, and the body.
  • The number of cells in an organism might differ as some organisms have a single cell while others are made up of billions of cells.
  • In the case of single-celled organisms, the singular cell is studied, whereas, for multicellular organisms, individual cells of different tissues are studied.
  • Initially, only the outer structure of a cell was studied due to the lack of complex microscopic processes.
  • Over the years, however, advancements in other areas have made it possible to study the internal cellular components of a cell.
  • Apart from the cell structure and function, cell biology also deals with cell communication and signaling.
  • Cell biology also involves the studying of the cell cycle and cell division, which provides insight into the cellular composition of an organism.
  • Cell biology is also linked with other studies like genetics, molecular biology, cytochemistry, and biochemistry.
  • Cells are distinguished as prokaryotic and eukaryotic cells based on the complexity of the cell.
  • Cell biology enables studying the biochemical mechanisms involved in cell metabolism and different forms of cellular energy.
  • Focusing on the structural and functional aspects of a single cell allows a detailed understanding of the body overall.
  • It is also easier to perform research on a single cell as it can be modified and observed efficiently.
  • Techniques in cell biology have advanced over the years with new and improved imaging techniques to observe smaller cellular organelles.
  • Cell biology, together with systemic biology, helps in the answering of complex questions like the relationship between cellular networks, the evolutionary relationship between genomes, and the complexity of the biomolecular composition of different living organisms.

Cilia and Flagella- Definition, Structure, Functions and Diagram

September 25, 2022May 15, 2022 by Sagar Aryal
Cilia and Flagella- Structure and Functions

Cilia and Flagella Definition Cilia and Flagella are complex filamentous cytoplasmic structures protruding through a cell wall. They are minute, especially differentiated appendices of the cell. Flagella (singular = flagellum) … Read more

Plastids- Definition, Structure, Types, Functions and Diagram

September 25, 2022May 11, 2022 by Sagar Aryal
Plastids- Types, Structure and Functions

Plastids Definition Plastid is a double membrane-bound organelle involved in the synthesis and storage of food, commonly found within the cells of photosynthetic plants. Plastids were discovered and named by Ernst … Read more

Platelets (Thrombocytes)- Definition, Structure, Immunity, Functions

October 21, 2022May 5, 2022 by Anupama Sapkota
Platelets (Thrombocytes)

Platelets or thrombocytes are anucleated cells derived from the megakaryocytic cells in the bone marrow that, besides being one of the key players in maintaining hemostasis, are involved in developing … Read more

Peroxisomes- Definition, Structure, Functions and Diagram

September 25, 2022May 4, 2022 by Sagar Aryal
Structure of Peroxisomes

Peroxisomes Definition Peroxisomes are small, membrane-enclosed cellular organelles containing oxidative enzymes that are involved in a variety of metabolic reactions, including several aspects of energy metabolism. They are considered as … Read more

Basophils- Definition, Structure, Immunity and Functions

September 25, 2022May 3, 2022 by Anupama Sapkota
Basophils

What are Basophils? Definition of Basophils Basophils are nonphagocytic granulocytes that are the least common leukocytes occurring in the blood circulation and are critical to the immune response against parasites. … Read more

Eosinophils- Definition, Structure, Immunity and Functions

September 25, 2022May 3, 2022 by Anupama Sapkota
Eosinophils

What are Eosinophils? Definition of Eosinophils Eosinophils are motile phagocytic cells that play an important homeostatic role in providing defense against parasitic infections. Eosinophils are bone marrow-derived granulocytes that remain … Read more

Vesicles- Definition, Structure, Functions and Diagram

September 25, 2022May 2, 2022 by Sagar Aryal
Vesicles- Structure, Types, and Functions

Vesicles Definition Cells must be able to move molecules, digest particles, and secrete materials in order to survive. For many cellular functions, vesicles are used. It is a small, spherical … Read more

Endocytosis vs Exocytosis (Similarities and Differences)

May 4, 2022May 1, 2022 by Faith Mokobi
Endocytosis and Exocytosis (Endocytosis vs Exocytosis)

Image Source: Freepik Company S.L. Similarities of Endocytosis and Exocytosis Endocytosis and exocytosis mechanisms are forms of Active Transport, both using energy to transport particles in and out of the … Read more

Dendritic Cells- Definition, Structure, Immunity, Types, Functions

September 17, 2022April 30, 2022 by Anupama Sapkota
Dendritic Cells

Dendritic cells are key antigen-presenting cells of the immune system that inform other effector immune cells to fight against invasive pathogens. These are also called professional antigen-presenting cells as these … Read more

Macrophages- Definition, Structure, Immunity, Types, Functions

October 21, 2022April 29, 2022 by Anupama Sapkota
Macrophages

Macrophages are mononuclear cells functioning as professional phagocytes to remove dying, dead or harmful pathogens. Macrophages are a type of white blood cell of the immune system where they engulf … Read more

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