1. 30.1 Organization of the Human Body
Lesson Overview
30.1 Organization of the Human Body

2. THINK ABOUT IT
The batter slaps a ball to the shortstop, who fields it and throws the ball toward first base. In a single motion, you extend your glove hand, catch the ball, and extend your foot to touch the edge of the base.
Think about how many systems of your body are involved in making this type of routine play. How do they all work together?

3. Organization of the Body
How is the human body organized?
The levels of organization in the body include cells, tissues, organs, and organ systems.

4. Organization of the Body
The levels of organization in the body include:
Cells
Tissues
Organs
Organ systems
At each level of organization, these parts of the body work together to carry out the major body functions.

5. Cells
A cell is the basic unit of structure and function in living things.
Specialized cells, such as
bone cells
blood cells
muscle cells
are uniquely suited to perform a particular function.

6. Epithelial Tissue
The tissue that lines the interior and exterior body surfaces is called epithelial tissue.
Examples: 
Your skin
The lining of your stomach
Function:
Protection
Absorption
Secretion

8. Connective Tissue Function: Location:
Tissue that provides support for the body and connects its parts is connective tissue.
This type of tissue includes:
fat cells
bone cells
blood cells
Function:
Binds epithelial tissue to structures
Supports
transports substances
Location:
Under the skin
surrounds organs
blood
bones

9. Connective Tissue
adipose
osteocyte
Leukocytes
and
Erythrocytes

10. Nervous Tissue
Nerve impulses are transmitted throughout the body by nervous tissue.
Examples:
Neurons- carry impulses
Glial cells- surround and protect neurons
Function:
Receives and transmits nerve impulses
Location:
Brain
Spinal Cord
Nerves

11. Nervous Tissue
Neurons
Glia Cells

12. Muscle Tissue Locations:
Movements of the body are possible because of muscle tissue.
Function:
Voluntary muscles are for controlled movement
Example: the muscles that move your arms and legs
Involuntary muscles are for uncontrolled movement
Example: the tiny muscles that control the size of the pupil in the eye
Locations:
Skeletal muscles
Digestive tract
Blood vessels
Heart

13. Muscle Tissue
Skeletal
Smooth
Cardiac

14. Organs
A group of different types of tissues that work together to perform a single or several related functions is called an organ.
Example:
The eye
Tissues that make up this organ:
epithelial tissue
nervous tissue
muscle tissue
connective tissue

15. Organ Systems
An organ system is a group of organs that perform closely related functions.
Example: (in nervous system)
Brain
Spinal cord
The organ systems interact to maintain homeostasis in the body as a whole.