LEVELS OF ORGANIZATION
Name: _________________________
What are the five levels of organization and their definition?
Level
Definition
1. Cells
Basic unit of life
2. Tissue
Similar cells working together
3. Organs
Two or more tissues working together
4. Organ Systems
Two or more organs working together
5. Organism
Organ systems working together
How does these cells’ form fit its functions?
Cell
Form (draw its shape)
Function
Red Blood Cell
Carries and delivers oxygen
throughout the organism
Nerve Cell
Shaped like a wire so it can
deliver bio-electrical impulses
Muscle Cell
To contract and relax smoothly
White Blood Cell
Shaped like blobs to engulf
What are the four different types of tissue and what is their function?
Tissue Type
Function
Where in your body?
Epithelial
Covers the outside of the body and lines
the inside
Connects other tissue together; provides
support and protects
Contracts and relaxes to allow
movement
Transmits messages through the body
Skin
Connective
Muscular
Nervous
Ligaments, cartilage, blood and
bone
Muscles and makes up many
organs
Nerves, brain and spinal cord
LEVELS OF ORGANIZATION
Name: _________________________
List 4 Organ systems, the main type of tissue, the main organs, and the function of that system.
ORGANS SYTEM
Respiratory System
TISSUE
Smooth Muscle
ORGANS
Nose, mouth, trachea,
and lungs
FUNCTION
Provide gas exchange
between blood and
environment: Oxygen in,
carbon dioxide out
Mouth, esophagus, liver, Breakdown and absorb
stomach, small intestine, nutrients that are
and large intestine
necessary for the body
Digestive System
Smooth Muscle
Nervous System
Nervous Tissue
Brain, spinal cord
Circulatory System
Cardiac Muscle and
Connective
Heart, arteries and veins
Carries messages back
and forth between the
spinal cord and the brain
and every other part of
the body
Pumps blood through
system carrying nutrients
and oxygen throughout
the body
Compare and contrast: Unicellular vs. Multicellular
Compare:
 Both are considered life.
 Both have organelles with in cell, organelles’ functions are the same
Contrast:
 Unicellular organisms have one cell, multicellular have many
 Unicellular organisms, since they are only one cell, can’t have tissue, organs or organ systems!
 Multicellular organisms have many types of cells, tissues, organs, and organ systems.