Respiratory system

When the lungs and the heart you compare
They're as different as blood is to air
Especially the lesions
For this there good reasons
Despite both the thorax they share.

Edema fills alveoli
When pressure in capillaries high
The cause is the heart
Which is failing in part
If unaided the patient will die.

When lungs have acute inflammation
Alveoli have infiltration
Exudates swell
With fibrin as well
Polymorphs are in high concentration.

Gaseous exchange is reduced
Dyspnea thus is induced
Without resolution
And clear involution
Fibrosis will then be produced.

Lungs may have tuberculosis
With caseous type of necrosis
Can cause cavitation
Or calcification
And focal pulmonic fibrosis.

Fungi in lungs can take root
Their hyphae have buds just like fruit
They may grow and progress
Or merely regress
For reasons that still remain moot.

Emphysema shows enlarged air spaces
Septa destroyed in some places
Alveoli shallow
Vessels are narrow
Obstruction is one of its bases.

Bronchiectasis means dilatation
A sequel to long inflammation
From partial obstruction
Poor mucus conduction
Progressively bad situation.

Patients with mitral stenosis
Have lungs which are firm with fibrosis
Iron is found
In cells free and round
And vessels show signs of sclerosis.

Man's lung is known for carcinomas
Much more common than types of sarcomas
Most often in smokers
In bronchi they're chokers
It's strange there so few adenomas.

The upper respiratory tract
Runs from nose to the trachea and back
Including the larynx
Of course nasopharynx
Has lesions of tubes in a sac.

The major disease is infection
Proceeds in a distal direction
In young and in old
You find common cold
Producing large mucus collections.

Polyps grow in and obstruct
The air column within the duct
Voices get hoarse
Or nasal and coarse
Depending on where they are stuck.

Laryngeal cancers are squamous
For this the vocal cord's famous
Like the lung once again
More frequent in men
Perhaps etiology same is.