Examlex
Describe each step of a muscle contraction.
Heart
A muscular organ that pumps blood through the circulatory system by rhythmic contractions.
Lung
A pair of respiratory organs situated within the thorax, responsible for gas exchange between the air and the blood.
Organ Systems
Groups of organs working together to perform complex functions necessary for life and health.
Metabolic Activity
Processes within living organisms that involve biochemical reactions, such as digestion, respiration, and energy production.
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