1. The smallest unit capable of life!
CELLS
The smallest unit capable of life!

2. Types of Living Things
Single-celled: simple; uni-cellular; bacteria; some protists (amoeba)
Multi-cellular: contain SPECIALIZED cells; some protists, animals, plants, fungi

3. How Living Things Are Organized

4. SPECIALIZATION
Different types of cells form during your development and perform different jobs
Differ in shape, size, function, and life span
Adult humans have over 200 types of cells
a.k.a. Differentiation

5. carry "messages" through the body1
nerve cells or neurons
carry "messages" through the body

7. 2 & 3 red blood cells carry oxygen from lungs to other body cells
white blood cells
defend body from disease

8. lengthen and contract to allow for movement4
muscle cells
lengthen and contract to allow for movement

9. shield the internal body from germs; control water loss5
skin cells
shield the internal body from germs; control water loss

10. form the skeleton and support the body6
bone cells
form the skeleton and support the body

11. Major Systems of the Human Body

13. Comparing Organ Systems
Stomach
Capillaries
Heart
Intestines
Bronchi
Esophagus
Bones
Blood
Trachea
Teeth and saliva
Arteries
Muscles
Ligaments
Veins
Lungs
Cartilage

16. defend body from disease
nerve cells or neurons
defend body from disease
carry oxygen from lungs to other body cells
muscle cells
shield the internal body from germs; control water loss
white blood cells
lengthen and contract to allow for movement

17. carry "messages" through the body
red blood cells
carry "messages" through the body
skin cells
bone cells
form the skeleton and support the body