The heart is a muscular organ that pumps blood throughout the body, supplying oxygen and nutrients. It has four chambers—two atria and two ventricles. Cardiovascular health is crucial for overall well-being.
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Myopia, or nearsightedness, is a vision condition where distant objects appear blurry due to the elongation of the eyeball. Corrective lenses or surgery can help manage myopia. Regular eye exams are essential.
Reflex actions are involuntary, rapid responses to stimuli, bypassing conscious control. They occur to protect the body and ensure survival, involving the spinal cord and peripheral nerves.