Download Levels of Organization

Medical Science I

Community


Group of populations that live together in a
defined area (Ex: businesses, people, pets,
etc. in Alvin)
Population

Group of individuals of the same species
that live in the same area (Ex: Latinos in
Alvin)

Organism
 Individual

form of life (ex: human)
Organ System
 Group
of organs that work together to
perform a specific function (ex: digestive
system)

Organ


Group of tissues that work together to
perform closely related functions (Ex:
stomach)
Tissue

Group of similar cells that perform a
particular function (Ex: Connective tissue)

Cell


Basic structure of animals (Ex: muscle cell)
Nucleus

An organelle in the cell containing
chromosomes (Ex: human nucleus with 46
chromosomes)

Chromosome


Structures with chemical instructions divided
in sections called genes (Ex: chromosome
#3)
Gene

Sequence of DNA that codes for proteins
and determines a trait (Ex: gene for eye
color)
 DNA
 Deoxyribonucleic
acid