The human body is made up of trillions of cells that come in different shapes and sizes to perform specialized functions. Cells work together to form tissues, organs, and organ systems that enable the body to function. The document outlines the basic levels of organization in the human body from cells to tissues to organs to organ systems and how they work cooperatively.

3. The human body is made up of
billion of cells.
It is a complex organism.

5.  The basic of life
 Humans are multicellular organisms composed
of millions of cell types.
 Each cell is a different size, shape and structure
to enable it to perform certain tasks.

6.  Red blood cells
 Nerve cells
 Bone cells

7.  Sperm cells
 Skeletal Muscle cells
 Epithelial cells

8.  A group of the same type of cells that work
together to carry out a function.
 Tissue containing the cells to grow, adapt, and
change the nature of nature at their disposal to
enable it to perform certain functions.

9.  Epithelial tissue
 Smooth muscle tissue

10.  A group of different tissues that work together to carry out
the function.
 For example, the skin is the organ that develops from
epithelial tissue, muscle tissue, connective tissue and nerve
tissue. Another example is the human organ abdominal
organs, lungs, heart, kidneys and brain.

11. Brain
Eyes
Lungs
Kidneys

12.  A group of different organs that work together to
carry out a function.
 For example, organs such as the nose, lungs, bronch,
and the bronchial tubes are interconnected to each
other to form the respiratory system.

13. DIGESTIVE SYSTEM

14.  Made up of different
systems that are
coordinated to carry out
various function.