Dec 10, 2025 · Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Most cells have one or more nuclei and other organelles that …

Cell theory, developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that cells are the fundamental unit of structure …

Some cells are organisms unto themselves; others are part of multicellular organisms. All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates...

Feb 22, 2021 · Cells are the basic building blocks of all living things. The human body is made of trillions of cells that carry out specialized functions.

Learn how cells work together in tissues, organs, and organ systems. In 1665, Robert Hooke coined the term cell to describe the structures he could see in cork with some of the first …

5 days ago · All cells can be sorted into one of two groups: eukaryotes and prokaryotes. A eukaryote has a nucleus and membrane-bound organelles, while a prokaryote does not. …

Apr 7, 2024 · Cells are incredibly diverse in their morphology and function. They can range from the minuscule Mycoplasmas, the smallest known cells, to complex multicellular organisms like …

Nov 19, 2023 · Cells can be broadly categorized into two types: prokaryotic cells and eukaryotic cells. Each type contains unique structures and functions, contributing to the diversity of living …

Although there are different types of cells, most cells have the same components. A cell consists of a nucleus and cytoplasm and is contained within the cell membrane, which regulates what …

Oct 15, 2025 · Cells are the basic units of life. The body contains trillions of cells, which vary widely in size, number, structure, and function. Cells also communicate with each other. …