Image of the Respiratory System

FUNCTIONS OF RESPIRATORY SYSTEM

• Provides an extensive area for gas exchange between air & circulating blood

• Moving air to & from the exchange surfaces of the lungs

• Protects respiratory surfaces from dehydration, temperature changes & other

environmental variations

• Defend respiratory system & other tissues from invasion by pathogenic micro-

organisms

• Produce sounds involved in speaking, singing or non-verbal communication

• Assists in regulation of blood volume, blood pressure & the control of body fluid

pH

Respiratory Overview Picture

Nasal

Cavity

Nose

Mouth

Bronchus

Bronchiole

Alveolus

Diaphragm

Throat

(pharynx)

Windpipe

(Trachea)

Left lungs

Ribs

CARTILAGES OF LARYNX

THYROID CARTILAGE

• Largest laryngeal cartilage

• Forms most of anterior & lateral

walls of larynx

• Commonly called Adams Apple

(laryngeal prominence)

• Inferior surface articulates with

cricoid

• Superior surface has ligamentous

attachments to epiglottis & other

smaller laryngeal cartilages

Alveoli and Bronchi Picture

Trachea

Bronchi Tubes

Bronchiole

Alveoli

Nasal Passage

Bronchi Tubes

Alveoli (air-sacs)

Thin-walled blood vessels

called capillaries

Very thin cells line the

alveoli so that O2 and

CO2 can pass in and

out of the blood.

Bronchioles pass

air to and from

your alveoli.

The Trachea

is held open

by partial

rings of

cartilage.

Tongue

Pharynx

Alveoli Picture

Here is a close

up picture of

your Alveoli

and a Capillary

surrounding it.

Capillary

Red Blood

Cell

Oxygen is

picked up

Carbon

Dioxide is

dropped off

Wall of

the air

sac

Nasal Passage

Bronchi Tubes

Alveoli (air-sacs)

Thin-walled blood vessels

called capillaries

Very thin cells line the

alveoli so that O2 and

CO2 can pass in and

out of the blood.

Bronchioles pass

air to and from

your alveoli.

The Trachea

is held open

by partial

rings of

cartilage.

Tongue

Pharynx

Where are

We?

Cool pictures

FISSURES & LOBES OF LUNG … LEFT LUNG

• 2 lobes viz. : superior & inferior

• Separated by oblique fissure

• Tongue shaped projection of left lung below cardiac notch is called LINGULA ;

corresponds to middle lobe of right lung

DIFFERENCES BETWEEN RIGHT & LEFT LUNGS

RIGHT LUNG LEFT LUNG

• Has 2 fissures, 3 lobes 1. 1 fissure, 2 lobes

• Anterior border straight 2. Anterior border interrupted by cardiac notch

• Larger, heavier (700g) 3. Smaller, lighter (600g)

• Shorter, broader 4. Longer, narrower

Diagram of Diaphragm

JH

Fun Facts

* At rest, the body takes in and breathes out about 10 liters of air each minute.

* The right lung is slightly larger than the left.

* The highest recorded "sneeze speed" is 165 km per hour.

* The surface area of the lungs is roughly the same size as a tennis court.

* The capillaries in the lungs would extend 1,600 kilometers if placed end to end.

* We lose half a liter of water a day through breathing. This is the water vapor we see when we breathe onto glass.

* A person at rest usually breathes between 12 and 15 times a minute.

* The breathing rate is faster in children and women than in men.