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Cells
Vocabulary
23
Religious Studies
7th Grade
03/12/2009

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Term
mitochondria
Definition
the energy-releasing parts of the cell
Term
bacteria
Definition
the smallest organisms on Earth
Term
organ
Definition
different types of tissues working together
Term
organelle
Definition
performs necessary activities for cells
Term
cytoplasm
Definition
a gelatin like substance that contains many chemicals needed for a cell to exist
Term
tissue
Definition
organized group of cells
Term
chloroplast
Definition
captures energy from sunlight
Term
cell wall
Definition
provides support and protection for plant cells
Term
nuclues
Definition
contains hereditary material
Term
organ system
Definition
group of organs that work together
Term
photosynthesis
Definition
process of capturing energy in plants
Term
vacuole
Definition
storage organelle of a cell
Term
cell membrane
Definition
helps control what enters and leaves the cell
Term
voluntary muscles
Definition
any muscles that you consciously control
Term
cartilage
Definition
thick,smooth layer of tissue that covers the ends of bones.
Term
joint
Definition
any place where two bones meet.
Term
ligaments
Definition
tough bands of tissue that hold bones together
Term
involuntary muscles
Definition
any muscles that you do not consciously control
Term
tendons
Definition
thick bands of tissue that attach muscles to bones
Term
epidermis
Definition
the outermost layer of the skin
Term
dermis
Definition
the middle layer of tissue under the epidermis
Term
melanin
Definition
chemical that gives skin its color
Term
periosteum
Definition
tough, tight-fitting membrane covering surface of bone
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