1. Human Systems Part One
Humans are complex organisms made up of many different types of systems, each carries out a specific life process.

2. Human Systems

3. A- Levels of Organization:
1- Cells the basic unit of life Humans have many different cells that carry out many different functions.

4. 2- Tissues: Groups of similar cells working together to perform a task
Heart
Lung
Skin
3- Organ: Groups of tissues working together to perform a task.

5. 4- Organ Systems: a group of Organs working together to perform a task.

6. II- Skeletal System A- Function B- Bones are Strong but Light.
1-Support
2- Protects Internal Organs
3- Produces Blood Cells
B- Bones are Strong but Light.

7. 1- Joints: Place where bones meet.
a- ball and socket
b-hinge
c-immovable
d-pivot

8. 2- Tendons: Attach muscle to bone
3-Ligaments: Attach bone to bone

10. III- Muscle A- Two Types 1- Voluntary you can control
a- Skeletal muscle
2- Involuntary you have no control over.
a- Cardiac (Heart)
b- Smooth (Stomach, Circulatory)

11. B- Skeletal Muscle: Works in opposing pairs

12. Front View (Anterior)
Back View (Posterior)

14. IV- Skin: 1- Function= b- Regulates Body Temperature
A- First Line of Defense:
1- Function=
a- Gets rid of wastes (perspire)
b- Regulates Body Temperature
c- Protects if not cut or open
d- Water proof

15. PORE
HAIR
NERVE ENDINGS
FAT CELLS
SWEAT GLAND
HAIR FOLLICLE
DERMIS
EPIDERMIS
BLOOD VESSELS