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TermDefinition
cytology the branch of biology concerned with the structure and function of plant and animal cells.
cell the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic.
organelle any of a number of organized or specialized structures within a living cell.
organism an individual animal, plant, or single-celled life form.
unicellular consisting of a single cell.
prokaryotic any of the typically unicellular microorganisms that lack a distinct nucleus and membrane-bound organelles and that are classified as a kingdom
prokaryote a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles
eukaroyatic An organism whose cells contain a nucleus surrounded by a membrane and whose DNA is bound together by proteins (histones) into chromosomes.
cell theory theory in biology that includes one or both of the statements that the cell is the fundamental structural and functional unit of living matter and that the organism is composed of autonomous cells with its properties being the sum of those of its cells.
virus an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
tissues any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products.
organ a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.
osmosis a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane.
active transport the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
semi-permiable allowing certain substances to pass through it but not others, especially allowing the passage of a solvent but not of certain solutes.
Phagocytosis the ingestion of bacteria or other material by phagocytes and amoeboid protozoans.
Pinocytosis the ingestion of liquid into a cell by the budding of small vesicles from the cell membrane.
Created by: danyelstlouis10
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