Download STUDY GUIDE FOR CELLS

STUDY GUIDE FOR CELLS
Vocabulary
Organism- any living thing
Specialized Cells-Cells made or used for one particular purpose. Example: Muscles cells are specialized
to help move your body. Because multicellular cells are specialized (focus on one job), then they
depend on other cells to help them survive.
Cell- The smallest part of a living thing that can carry out all the processes of life.
Unicellular Organism- An organism made up of only one cell. They are capable of surviving as a single
cell. To stay alive, a unicellular organism must be able to reproduce, eat food for nutrients, respond to
its environment and maintain a stable internal environment.
Examples of unicellular cells: algae, bacteria, some fungi, amoebas, diatoms and euglena
Multicellular organism- An organism that is made up of more than one cell. They are more complex
than unicellular organisms. Multicellular organisms are living things that are made up of many different
specialized cells. Multicellular cells are specialized cells to survive. Example: specialized cells such as
nerve and muscle cells work together to help an organism respond to its environment.
Examples of multicellular cells are : Humans, Grasshoppers, Crickets, Dogs, Cats, animals and insects.
6 characteristics of living things are:
1.
2.
3.
4.
5.
6.
All living things are made up of cells.
All living things respond to the environment.
All living things grow.
All living things must maintain a stable internal environment.
All living things must reproduce.
All living things need nutrients and must get and use energy from their environment.
How the human body is organized.
Cell-smallest part of a living thing—cells group together to form tissue-example muscle cell
Tissues- a group of cells that perform a specific job-example muscle tissue
Organ- a specialized collection of tissues that does a specific job-example lungs help you breathe
System- a group of organs working together to perform a job-example: nervous system-brain, spinal
cord, nerve cells (all these work together to form a system)