Oct 7, 2025 · What is a cell? A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter …

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 …

Jun 14, 2025 · Explore the structure, types, and functions of cells in this student-friendly guide to cell biology and cell theory.

4 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, 2025 · At the most fundamental level, a cell consists of a cell membrane, cytoplasm, and genetic material (DNA or RNA). The cell membrane is a semi-permeable barrier that regulates …

CELL definition: 1. the smallest basic unit of a plant or animal 2. a small room with not much furniture, especially…. Learn more.

Oct 15, 2025 · A cell is the smallest living organism and the basic unit of life on earth. Together, trillions of cells make up the human body.

What is a cell? A cell is the basic unit of life as we know it. It is the smallest unit capable of independent reproduction. Robert Hooke suggested the name ‘cell’ in 1665, from the Latin …

All cells evolved from a common ancestor and use the same kinds of carbon-based molecules. Learn how cell function depends on a diverse group of nucleic acids, proteins, lipids, and sugars.

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.