Examlex
Identify and state the historical significance of the following:
-Frederick Douglass
Major Organs
Refers to essential organs in a body system that have vital roles, such as the heart, lungs, liver, brain, and kidneys, crucial for maintaining life and health.
Umbilical Cord
A flexible cord that connects a fetus to the placenta, delivering oxygen and nutrients and removing waste products from the fetus.
Zygote
A fertilized egg cell that results from the union of a female gamete (egg) with a male gamete (sperm).
Concrete Operations
a stage in Jean Piaget's theory of cognitive development during which children gain the ability to think logically about concrete events.
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