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17 terms

Cells Ch 1-1

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tissue
a group of similar cells that work together to perform a specific job in the body
organ
a combination of two or more tissues that work together to perform a specific function
organ system
a group of organs working together to perform body functions
organism
anything that can independently carry out life processes
unicellular
made of a single cell
multicellular
made of many cells
population
a group of individuals of the same species that live together in the same area at the same time
community
all of the populations of different species that live and interact in an area
ecosystem
a community of organisms and their non-living environment
heart, leaf, stomach
examples of organs
simple microscope
a microscope that contains only one lens
cell
the basic unit of living things
compound microscope
uses more than one lens to magnify an object
resolution
the ability to distinguish individual parts
convex lens
a lens that is thicker in the center that at the edges
electron microscope
uses a beam of electrons instead of light to create a magnified image
magnification
making an object appear larger than it really is