Levels of organization of human

1. Levels Of Organization

2. The levels of organization from
simplest to most complex are:
 Cells
 Tissues
 Organs
 System
 Organism

3. Cells
The basic unit of structure and function in
the human body
 All living structures of human anatomy co
ntain cells, and almost all functions of hu
man physiology are performed in cells or
are initiated by cells.

4. Cells

5. Tissues
 A group of specialized cells that
work together to perform the sa
me function.

6. Organs
A group of two or more different types of
tissue that work together to perform a sp
ecific function.
The task is generally more complex than t
hat of the tissue.
For example, the heart is made of muscle
and connective tissues which functions to
pump blood throughout the body.

7. Organs

8. Organ Systems
 A group of two or more organs that work togeth
er to perform a specific function.
 Each organ system has its own function but the s
ystems work together and depend on one anoth
er.
 There are eleven different organ systems in the h
uman body: circulatory, digestive, endocrine, exc
retory (urinary), immune, integumentary, muscul
ar, nervous, reproductive, respiratory, and skelet
al.

10. Organism
An organism is a living being that has a
cellular structure and that can
independently perform all physiologic
functions necessary for life.
In multicellular organisms, including
humans, all cells, tissues, organs, and
organ systems of the body work
together to maintain the life and health
of the organism.

12. Thanks for your
attention