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Science Grade 7

Cells & Organelles

microscope an instrument that makes small objects look larger
resolution the ability to clearly distinguish the individual parts of an object
mitochondrion rod-shaped cell structures that produce most of the energy needed to carry out the cell's functions
vacuole a water-filled sac inside a cell that acts as a storage are
ribosome a tiny structure in they cytoplasm of a cell where protiens are made
nucleolus where ribosomes are made
compound microscope a light microscope that has more than one lens
convex lens a curved lens in which the center is thicker than the edges
chloroplast a structure in cells of plants and some other organisms that captures energy from sunlight and uses it to produce food
cell membrane the outside boundary if a cell; controls which substances can enter or leave the cell
nuclear membrane protects the nucleus
Golgi body a structure in a cell that receives protiesn and other newly formed materials from the endoplasmic reticulum, packages them, and distributes them to other parts of the cell.
cell theory a widely accepted explanation of the relationship between cells and living things
cell wall a rigid layer of nonliving material that surrounds the cells of plants and some other organisms.
lysosome a small round cell structure that contains chemicals that break down large food particles into smaller ones
cytoplasm the region of a cell located inside the cell membrane (in prokaryotes) or between the cell membrane and nucleus (in eukaryotes); contains a gel-like material and cell organelles.
magnification the ability to make things look larger than they are
organelle a tiny cell structure that carries out a specific function within a cell
endoplasmic reticulum a cell structure that forms a maze of passageways in which protiens and other materials are carried from one part of the cell to another
nucleus the control center of a cell that directs the cell's activites; contains the chemical instrutions that direct all the cell's activities and deterine the cell's characteristics
chromatin material in cells that contains DNA and carries genetic information
Created by: smuehleisen