
What are the 5 levels of cellular organization?

Compare/ contrast cells, tissues, organs and
organ systems.
Levels of Cellular organization:
Cell  tissue  organ  organ system  organism
Levels of Cellular organization:
Cell  tissue  organ  organ system  organism
Example:
bone  connective  bone  skeletal  person
cell
tissue
system
Cells are microscopic and contain organelles.
(ribosomes, mitochondria, nucleus….)
Organelles are cell structures that carry out the
processes which keep organisms alive.
A tissue is formed when many of the same type of
cells work together.
There are four basic types of tissue:
muscle tissue
nervous tissue
connective tissue
epithelial tissue
Organs can be composed of many different types of
cells and tissues.
Living things may be similar or they may have unique
organs that allow them to survive in their habitat.
Examples:
Organs can be composed of many different types of
cells and tissues.
Living things may be similar or they may have unique
organs that allow them to survive in their habitat.
Examples: heart, lungs, wings, ears, echolocation
‘radar’, roots, leaves, seeds
When different organs work together an organ
system is created.
Each organ system has specific functions in order
to maintain homeostasis.