7Th Science-Chap.2

Front 1

cell membrane

Back 1

outer covering of a cell made of layers of linked molecules.

Front 2

cytoplasm

Back 2

gelatinlike material inside all cells that keeps the organelles in position.

Front 3

cell wall

Back 3

rigid,tough outer covering that protects plant cells and gives them their shape.

Front 4

organelle

Back 4

structure in he cytoplasm of the eukaryotic cells.

Front 5

nucleus

Back 5

organelle that directs the activities of all other organelles. a.k.a "the brain of the cell."

Front 6

chloroplast

Back 6

organelles found only in plant cells that chlorophyll that makes plants green and allows them to make food through photosynthesis.

Front 7

mitochondrion

Back 7

structure in a cell that stores energy from food.

Front 8

ribosome

Back 8

structure on which cells make proteins.

Front 9

endoplasmic reticulum (ER)

Back 9

series of folded membranes that extends from the nucleus to the membrane.

Front 10

golgi body

Back 10

stacked, flattened membranes that store cellular substances such as proteins into vesicles.

Front 11

tissue

Back 11

groups of similar cells that work together to do one job.

Front 12

organ

Back 12

structure of multiple tissues that work together to perform a certain life function.

Front 13

cell theory

Back 13

theory stating that all living organisms are made up of cells.

Front 14

virus

Back 14

strand of hereditary material surrounded by a protein coating.

Front 15

host cell

Back 15

living cell in which a virus can actively multiply or in which virus can hide until activated by environmetal stimuli.