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1

Chapter 25
BREATHING moves air in and out of long

Pulmonary ventilation

2

Exchanges gases IN LUNGS; BLOOD GAINS o2 AND LOSES Co2

External respiration

3

EXCHANGES gases IN TISSUE CELLS; BLOOD LOSES O2 AND GAINS CO2

INTERNAL Respiration

4

Throat

Pharynx

5

Posterior to nose and contains AUDITORY TUBE

Upper NASOPHARNX

6

Voice box

Larynx

7

CONNECTS PHARYNX with ___

TRACHEA

8

WIND PIPE

Trachea

9

-anterior to esophagus
-lined by cilated cells that move trapped particles upward
-divides into right and left primary bronchi

Trachea (wind pipe)

10

_____________relaxes smooth muscle in bronchi; DILATING AIRWAYS increasing air flow

SYMPATHETIC response

11

Chapter 25- the respiratory system
Warms humidifies and ______

Filters air

12

SURRONDS LUNGS and consists of 2 layers

PLEURAL MEMBRANE

13

LINES THORACIC WALL AND VISCERAL LAYER COVERS LUNGS

PARTIAL LAYER

14

Produce SURFACTANT,preventing the collapse of alveoli by LOWERING surface tention

Type 2 ALVELOAR (SEPTAL) CELLS

15

ACTIVE PROCESS; PHRENIC NERVE STIMULATES DIAPHRAGM to contract

QUIET INHALATION

16

Is a PASSIVE process; diaphragm relaxes

QUIET EXHALATION

17

Is in an active process;INTERNAL INTERCOSTALS AND ABDOMINAL MUSCLES CONTRACT

FORCED EXHALATION

18

Volume + pressure changes

The respiratory system

19

_____ and _____ are inversely related

Volume + pressure

20

At rest adults breath equal ____ minutes

12

21

= volume in one NORMAL breath

Tidal volume

22

Volume forcibly INHALED (about 60% lung capacity)

INSPIRATORY

23

= volume

Expiratory reserve