Levels of Organization
What is the basic unit of life?
Cells
If we compare the levels of organization to a building where:
Bricks --> Wall --> Building --> Neighborhood --> City
Which level of this analogy is equivalent to a cell?
The Bricks
(they are the smallest level)
A student has weak bones and breaks them easily because minerals are not being stored correctly.
Skeletal
Human
Organism
When you take a deep breath, oxygen enters your lungs and is carried to the rest of your body.
Circulatory & Respiratory
What do organisms consist of?
If we compare the levels of organization to a building where:
Bricks --> Wall --> Building --> Neighborhood --> City
Which level of this analogy is equivalent to an organism?
City
(Biggest level)
A person feels very tired because oxygen is not getting to their cells efficiently.
Circulatory
Organ System
After running in gym class, your heart beats faster to deliver oxygen to your leg muscles.
Muscular, Circulatory & Respiratory
What are organ systems made of?
If we compare the levels of organization to a building where:
Bricks --> Wall --> Building --> Neighborhood --> City
Which level of this analogy is equivalent to an organ?
Building
(3rd level in each)
Messages from the brain are delayed, causing slow reaction time and poor coordination.
Nervous
Heart
Organ
Food is broken down in your stomach and nutrients are absorbed into your bloodstream.
What is a tissue?
Multiple types of the same cell working together.
If we compare the levels of organization to a building where:
Bricks --> Wall --> Building --> Neighborhood --> City
Which level of this analogy is equivalent to a tissue?
Wall
(2nd Level in each)
A person becomes dehydrated because wastes are not being removed properly from the blood.
Excretory
Nerves
Tissue
When you touch a hot stove, your hand quickly pulls away before you even think about it.
Nervous & Muscular
What are organs made of?
Tissues
If we compare the levels of organization to a building where:
Bricks --> Wall --> Building --> Neighborhood --> City
Which level of this analogy is equivalent to an organ system?
Neighborhood
(4th level in each)
A person feels dizzy when standing up because blood is not moving effectively against gravity.
Muscular
Blood
Tissue
Calcium from food helps keep your bones strong and healthy.
Digestive & Skeletal (& Circulatory)