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ExSciEd (YouTube Channel)


cell : a small usually microscopic mass of protoplasm bounded externally by a semipermeable membrane, usually including one or more nuclei and various other organelles with their products, capable alone or interacting with other cells of performing all the fundamental functions of life, and forming the smallest structural unit of living matter capable of functioning independently — Merriam-Webster   See also   OneLook


Cell is the basic structural, functional, and biological unit of all known living organisms. A cell is the smallest unit of life. Cells are often called the “building blocks of life”. Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids. Organisms can be classified as unicellular (consisting of a single cell; including bacteria) or multicellular (including plants and animals). While the number of cells in plants and animals varies from species to species, humans contain more than 10 trillion cells. Most plant and animal cells are visible only under a microscope, with dimensions between 1 and 100 micrometres. — Wikipedia

Cell (Encyclopædia Britannica)
Cell (Biology Online)



Talks about Cells (TED: Ideas Worth Spreading)
Articles about Cells (Big Think)




Cell Biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. Cell biology is the study of structural and functional units of cells. Cell biology encompasses both prokaryotic and eukaryotic cells and has many subtopics which may include the study of cell metabolism, cell communication, cell cycle, biochemistry, and cell composition. The study of cells is performed using several microscopy techniques, cell culture, and cell fractionation. — Wikipedia

Cytology (Encyclopædia Britannica)
Cytology (Biology Online)




The History Of Cell Theory (Encyclopædia Britannica)


DDC: 571.6 Cell Biology (Library Thing)
Subject: Cell (Library Thing)

Subject: Cell (Open Library)

LCC: QH 573 Cell Biology (UPenn Online Books)
Subject: Cell (UPenn Online Books)

LCC: QH 573 Cell Biology (Library of Congress)
Subject: Cell (Library of Congress)

Subject: Cell (WorldCat)




Cells (Learn Genetics, University of Utah)
Cell Biology (The Biology Project, University of Arizona)
Cell Biology (James A. Sullivan, CELLS Alive!)
Cell Biology Tutorial (Biology Online)
Cells are the Starting Point (Biology4Kids)

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources


Cell Biology (MIT OpenCourseWare)



Molecular and Cellular Biologists (CareerOneStop, U.S. Department of Labor, Employment and Training Administration)


American Society for Cell Biology


Molecular Biology of the Cell (The American Society for Cell Biology)
Cell (Cell Press)
Nature Cell Biology
Cell biology (Nature)
Cell (EurekaAlert, American Association for the Advancement of Science)
Cell Biology (bioRxiv: Preprint Server for Biology, Cold Spring Harbor Laboratory)
Cell Biology (Science Daily)

Cell Resources (JSTOR)
Cell Biology Resources (JSTOR)
Cell Biology JOunals and Books (JSTOR)


Cellular Dynamics and Function (Division of Molecular and Cellular Biosciences, National Science Foundation)


Cell (USA.gov)



Here are links to pages about closely related subjects.

Knowledge Realm

Terrestrial   (Earth)

Sphere Land, Ice, Water (Ocean), Air, Life (Cell, Gene)
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Tree of Life
Microorganism Virus
Prokaryote Archaea, Bacteria
Eukaryote Protist, Fungi, Algae, Protozoa (Tardigrade)
Plant Flower, Tree
Cnidaria Coral, Jellyfish
Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Fish Seahorse, Ray, Shark
Amphibian Frog, Salamander
Reptile Turtle, Tortoise, Dinosaur
Bird Penguin, Ostrich, Owl, Crow, Parrot
Mammal Platypus, Bat, Mouse, Rabbit, Goat, Giraffe, Camel, Horse, Elephant, Mammoth
Walrus, Seal, Polar Bear, Bear, Panda, Cat, Tiger, Lion, Dog, Wolf
Cetacean Whale, Dolphin
Primate Monkey, Chimpanzee, Human


1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.