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DNA is a complex
Fetus's Lungs
The developing respiratory organs in a fetus, which undergo significant growth and maturation during pregnancy to prepare for air breathing after birth.
Breathing Air
The process of inhaling oxygen and exhaling carbon dioxide, essential for life in most organisms.
Arm Buds
Early stages in embryonic development during which the limbs begin to form and differentiate from the main body.
Leg Buds
Early embryonic structures that eventually develop into the legs in various animals, including humans.
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