A hydrogen atom forms one bond, an oxygen atom forms two, and carbon forms four bonds.
The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges. The brain is also cushioned and protected by cerebrospinal fluid. This watery fluid is produced by special cells in the four hollow spaces in the brain, called ventricles.
These are diseases that affect primarily the lungs or any other part of the respiratory system.
<h3>What are respiratory disorders?</h3>
The term respiratory disorders refers to those diseases that affect primarily the lungs or any other part of the respiratory system. These are the diseases that prevent a person from breathing in and out normally and prevent the lungs from playing its usual role in gaseous exchange.
The respiratory disorders could be able to make a person not to be able to breathe well and it may lead to hospitalization and death of the patient of adequate treatment is not sought from an expert who could diagnose and treat such respiratory disorders.
The common types of respiratory disorders are;
- asthma
- cystic fibrosis
- emphysema
- lung cancer
- mesothelioma
- tuberculosis
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In astronomy, Kepler's laws of planet motion are three scientific laws describing the motion of planets around the Sun, published by Johannes Kepler between 1609 and 1619.
