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Cell Organelles
cell organelles
19
Biology
8th Grade
03/20/2008

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Term
Organ
Definition
A collection of tissues that carry out a specialized function of the body.
Term
Organ System
Definition
A group of organs that work together to perform body functions.
Term
Tissue
Definition
A group of similar cells that perform a common function.
Term
Cell
Definition
In biology, the smallest unit that can perform all life processes; cells are covered by a membrane and have DNA and cytoplasm.
Term
Golgi Complex
Definition
Cell organelle that helps make and package materials to be transported out of the cell.
Term
Ribosomes
Definition
Cell organelle composed of RNA and protein; the site of protein synthesis.
Term
Mitochondrion
Definition
In eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration.
Term
Vesicle
Definition
A small cavity or sac that contains materials in a eukaryotic cell.
Term
Lysosomes
Definition
A cell organelle that contains digestive enzymes.
Term
Endoplasmic Reticulum
Definition
A system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids.
Term
Organelle
Definition
oneof the small bodies in a cell's cytoplasm that are speicialized to perform a specific function.
Term
Cell Membrane
Definition
a phospholipid layer that covers the cell's surface; acts as a barrier between the inside of a cell and the cell's environment.
Term
Nucleus
Definition
in a eukaryotic cell, a membrane bound organell that contains the cell's DNA and that has a role in processes such as growth, metabolisma nd reproduction.
Term
Prokaryote
Definition
an organism that consists of a single cell that does not have a nucleus.
Term
Eukaryote
Definition
an organism made up of cells taht have anucleus encolsed by a membrane; eukaryotes include animals, plants, and fungi but not archaebacteria or eubacteria.
Term
Cell Wall
Definition
a rigid structure that surrounds the cell membrane and provides support to the cell.
Term
Organism
Definition
a living thing; anything that can cary out life processes independently.
Term
Structure
Definition
the arrangement of parts in an organism
Term
function
Definition
the specail, normal or proper activity of an organ or part.
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