1. The Human Body
Body Systems
(2 of 3)

2. Functions of the Musculoskeletal System
Gives the body shape
Protects internal organs
Provides for movement
Consists of more than 600 muscles

3. The Respiratory System
Note that text on graphic may be difficult to read.

4. Control of Breathing Brain stem controls breathing.
Increases breathing rate if the carbon dioxide level in blood becomes too high
Hypoxic drive is a “backup system.”
Activates when oxygen levels fall to stimulate breathing

5. Normal Breathing Characteristics
Normal rate and depth
Regular rhythm
Good breath sounds in both lungs
Regular rise and fall movements in the chest
Easy, not labored

6. Normal Breathing Rates Adults. 12 to 20 breaths/min Children
Normal Breathing Rates Adults 12 to 20 breaths/min Children to 30 breaths/min Infants to 60 breaths/min

7. Recognizing Inadequate Breathing
Pale or blue skin
Cool, clammy skin
Faster respiratory rate
Irregular rhythm
Labored breathing
Muscle retractions

8. The Circulatory System
Note that text on graphic may be difficult to read.

9. Electrical Conduction System
SA node
AV node
Purkinje fibers

10. Normal Heart Rates Adults 60 to 100 beats per minute
Children 70 to 120 beats per minute
Toddlers 90 to 150 beats per minute
Newborns 120 to 160 beats per minute

11. Major Arteries and Veins
Aorta
Pulmonary
Carotid
Femoral
Brachial
Radial
Superior vena cava
Inferior vena cava
Pulmonary