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Cells
Cells Vocabulary
18
Science
6th Grade
01/19/2011

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Term
Bacteria
Definition
smallest organisms on earth
Term
Cell Membrane
Definition
flexible structure that holds the cell together (walls of the bakery)
Term
Cell Wall
Definition
supports and protects the cell
Term
Cytoplasm
Definition
the gelatin like substance that fills the inside of the cell
Term
Organelle
Definition
specialized cell parts that can more around in the cytoplasm and perform activities necessary for life
Term
Nucleus
Definition
organelle that holds hereditary material, contains chromosomes which contain DNA
Term
Vacuole
Definition
food, water and other substances are stored in these balloon like organelles in the cytoplasm
Term
Mitochondria
Definition
energy producing area, cellular respiration occurs here
Term
Photosynthesis
Definition
process that allows plants, algaes, and many types of bacteria to make food; usually occurs in leaf cells
Term
Chloroplast
Definition
green organelles within the leaf cells
Term
Tissue
Definition
groups of similar cells that all do the same sort of work
Term
Organ
Definition
different types of tissues working together
Term
Organ System
Definition
a group of organs that work together (digestive system, respiratory system, circulatory system, reproductive system, and nervous system)
Term
Chlorophyll
Definition
is a green pigment found in almost all plants, algae, and cyanobacteria.
Term
Nucleolus
Definition
is a non-membrane bound structure composed of proteins and nucleic acids found within the nucleus.
Term
Ribosomes
Definition
are the components of cells that make proteins from all amino acids.
Term
Lysosome
Definition
are cellular organelles which contain acid hydrolase enzymes to break up waste materials and cellular debris.
Term
Cell Theory
Definition
refers to the idea that cells are the basic unit of structure in every living thing.
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