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How do veins keep blood from flowing backwards in them?
Sensorimotor
The stage in Jean Piaget's theory of cognitive development where infants learn to interact with their environment through physical actions, from birth to about 2 years of age.
Cognitive Development
The process of growth and change in intellectual capabilities that occur from infancy through independent adulthood, encompassing processes such as learning, memory, problem-solving, and decision-making.
Concrete Operations
A stage in Piaget's theory of cognitive development, occurring between ages 7 and 11, where children gain a better understanding of mental operations and can think logically about concrete events.
Stimulus
Any external or internal event or factor that influences or triggers a reaction in a biological organism.
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