Sistem Pernafasan

  • December 2019
  • PDF

This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA


Overview

Download & View Sistem Pernafasan as PDF for free.

More details

  • Words: 1,949
  • Pages: 25
Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

ANATOMI DAN FISIOLOGI PERNAFASAN

Dr. Aidi Nasrul AKBID SUMBAR LUBUK ALUNG 2008

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Introduction to Pulmonary Physiology • The pulmonary system, in tandem with the cardiovascular system, works to carry out three functions: – Ventilation – Perfusion – Diffusion

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Anatomy

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Upper Airways • Structures – Nasopharynx – Oropharynx – Tongue – Epiglottis – Larynx • Function – Protection – Humidification – Filtration

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Lower Airways • Structures – – – –

Trachea Mainstem bronchi Bronchioles Terminal bronchioles

• Function – Filtration – Transmission of air

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Structural Considerations

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Structural Considerations • Cilia: beat 100 times/second • MAST cells secrete sticky substance filled with WBCs

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Alveolus • 100 million alveoli in each lung • Single cell thick wall • Immediately adjacent to pulmonary capillary • Gas exchanges via diffusion

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

1. Ventilation • Definition: movement of air from the external environment to the alveoli • Components: • • • • •

Brain Innervation Chest wall Upper airways Lower airways

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Inspiration • Increased intrathoracic space • Negative pressure • Bronchioles dilate • Air enters airways/alveoli (unless a hole is present in the chest wall)

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Expiration • Diaphragm & intercostals relax • Thoracic space gets smaller • Increased intrathoracic pressure • Air passively exits via airways

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

What Happens to the Airways? • Smooth-muscle lined airways (bronchioles) naturally change diameter with inspiration and expiration • (This will be important when we discuss obstructive lung disease)

Inspiration

Expiration

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

2. Perfusion • Definition of perfusion: adequate blood flow through the pulmonary capillary bed • Components: – Intact pulmonary capillary bed – Adequate cardiac function – Adequate blood volume

R Heart

L Heart

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Pulmonary Capillary Bed May be damaged by: • Clots (pulmonary emboli) • Crushing injuries (pulmonary contusion)

R Heart

L Heart

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Cardiac Function • The pulmonary capillary bed is part of the cardiopulmonary circuit • Impairment of flow through any chamber or valve will impact pressures and flow

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Blood Volume • Adequate perfusion requires adequate blood volumes AND composition • Reduction of volume, or decreased/ inadequate RBCs will diminish perfusion

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

3. Diffusion – Definition of diffusion: movement of gases between the alveoli and the pulmonary capillary bed – Components: • Alveolus • Basement membrane (interstitial space) • Capillary wall

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Diffusion? • The passive exchange of gases along a concentration gradient (high to low) • Exchange continues until the concentrations are equal

Before diffusion CO2

O2 CO2 O2

After diffusion O2 CO2

O2 CO2

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Diffusion?

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Basement Membrane • Includes the walls of the alveolus and capillary • Most importantly, includes the interstitial space between the walls of the capillary and alveoli • Drainage via lymphatics

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Capillary Wall • If capillary wall is thickened, diffusion will be impaired • If capillary wall is damaged, diffusion will be impaired

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

w.

A B B Y Y.c

om

Y

F T ra n sf o

A B B Y Y.c

bu to re he C

lic

k

he k lic C w.

om

w

w

w

w

rm

y

ABB

PD

re

to

Y

2.0

2.0

bu

y

rm

er

Y

F T ra n sf o

ABB

PD

er

Y

Terima Kasih

w.

A B B Y Y.c

om

Related Documents

Sistem Pernafasan
November 2019 46
Sistem Pernafasan
December 2019 42
Sistem Pernafasan
May 2020 41