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Smoking severely damages the respiratory system, it may cause COPD or lung cancer.
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Tobacco smoke contains carcinogenic substances that damage DNA. This may lead to uncontrolled cell growth and the formation of tumors.
Besides destroying tissues, malignant or cancerous tumors may cause metastatic tumors: tumor cells spread throughout the lymphatic system or the blood vessels and form tumors in other parts of the body.
A blood clot that forms in the deep veins of the lower limbs can cause a fatal pulmonary...
Adrenaline, also known as epinephrine, is a hormone produced in our bodies in stressful...
The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary...
This animation introduces the most important organ systems of the human body.
The cause of a heart attack is the blockage of a coronary artery. It is one the most...
During swallowing food travels from the mouth cavity into the stomach.
Producing speech requires the synchronized operation of several cortical centers.