Question

what is the meaning of respiratory diseases and name some respiratory diseases caused by tobacco and pollution and also mention their symptoms

Answer 1

Respiratory diseases are those diseases which are caused by the malfunctioning of respiratory tract. Cancer can be caused by tobacco and pollution
Symptoms are:-
Skin becomes rough.
Headache
Unconsciousness
Vomiting

Answer 2

HERE IS YOUR ANSWER..
Respiratory disease , any of the diseases and disorders of the airways and the lungs that affect human respiration.
Diseases of the respiratory system may affect any of the structures and organs that have to do with breathing , including the nasal cavities, the pharynx (or throat), the larynx , the trachea (or windpipe), the bronchi and bronchioles, the tissues of the
lungs , and the respiratory muscles of the chest cage.
The respiratory tract is the site of an exceptionally large range of disorders for three main reasons: (1) it is exposed to the
environment and therefore may be affected by inhaled organisms, dusts, or gases; (2) it possesses a large network of capillaries through which the entire output of the
heart has to pass, which means that diseases that affect the small blood vessels are likely to affect the lung; and (3) it may be the site of “sensitivity” or allergic phenomena that may profoundly affect function.

During normal breathing, inhaled air travels through two main channels (primary bronchi) that branch within each lung into smaller, narrower passages (bronchioles) and finally into the tiny, terminal bronchial tubes. During an asthma attack, smooth muscles that surround the airways spasm; this results in tightening of the airways, swelling and inflammation of the inner airway space (lumen) due to fluid buildup and infiltration by immune cells, and excessive secretion of mucus into the airways. Consequently, air is obstructed from circulating freely in the lungs and cannot be expired.
Here are some of the most gruesome diseases caused by tobacco and pollution:

1. Lung Cancer

More people die from lung cancer than any other type of cancer. Cigarette smoking is the number one risk factor for lung cancer; it's responsible for 87 percent of lung cancer deaths. Your chance of still being alive five years after being diagnosed is less than 1 in 5.

2. COPD (chronic obstructive pulmonary disease)

COPD is an obstructive lung disease that
makes it hard to breathe . It causes serious long-term disability and early death. COPD starts by making it hard to be active, such as playing with a grandchild, then usually gets worse, until climbing a short set of stairs or even walking to get the mail is exhausting or impossible. It can leave people stuck in their homes, unable to do the things they want or see friends. About 80 percent of all COPD is caused by cigarette smoking. COPD is the third leading cause of death in the United States.

3. Asthma

Asthma is a chronic lung disease that makes it harder to move air in and out of your lungs—otherwise known as "breathing." Because cigarette smoke irritates air passages, it can trigger sudden and severe asthma attacks . Asthma is a serious health condition that affects more than 26 million Americans. Smoking only makes it worse.

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