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Explanation

The name of any particular person, place or thing is called Proper Noun.

Iran, Islamabad, Samsung, K2 etc. are examples of Proper Noun. 

Explanation

• The de-oxygenated blood from the heart comes to the lungs through the Pulmonary artery
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• The deoxygenated blood returns from the body to the right atrium and from there enter the right ventricle that pumps it to the lungs through the main pulmonary artery (pulmonary trunk).
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• The pulmonary veins transport oxygenated blood back to the heart from the lungs
  

Explanation

Here the word 'every indicated this sentence belong to President Indefinite Tense. 

We use first form of verb (play) with I in this tense.

I play tennis every Saturday means میں ہر ہفتے کو ٹینس کھیلتا ہوں

Explanation

The trachea is often called the windpipe. 

Trachea  is a key part of your respiratory system.

Explanation

Tuberculosis (TB) is caused by a bacterium called Mycobacterium tuberculosis.

The bacteria usually attack the lungs, but TB bacteria can attack any part of the body such as the kidney, spine, and brain.

Explanation

The term EPI stands for Expanded Programme on Immunization. 

EPI was launched in Pakistan in 1978.