Examlex
Which of the following is true of children specifically in the concrete operational stage of Piaget's cognitive development theory?
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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