Levels of Organization
A living thing that carries out its own life activities
Organism
Organ
Maintaining stable internal conditions necessary for life
Changes to the environment.
Where do organisms directly get energy from?
Food
A group of two or more organs that work together to perform a specific function
Organ System
An organism that only has one cell is called ______
Unicellular
When a human steps out into the cold air, the body begins to shiver in order to keep a temperature of 98.6 degrees Fahrenheit
All living things mantain an internal balance | Homeostasis
What is internal stimuli?
Changes inside an organism.
Where does all the energy for organisms come from originally?
The Sun.
A group of similar cells that work together to perform the same function
Tissue
A whale is an example of an ______
Organism
A sea worm drops its tail, and the tail becomes a new worm
All living things reproduce
Changes outside an organism.
What is an example of homeostasis?
Sweating, shivering, or changing the flow of blood to maintain the body temperature of 37°C
A group of two or more tissues that work together to perform a specific function
Organ
A muscle tissue is an example of an ______
Tissue
All living things grow and develop
What is an example of Internal Stimuli?
Hunger, thirst, pain.
What is a cell?
The basic unit of life
Smallest unit of structure in a living thing
Cell
An organism that is made of more than one cell is called ______
Multicellular
An amoeba is a unicellular organism
All living things contain cells
What is an example of external stimuli?
Light and temperature
What are things that have all the characteristics of life called?
Organisms