Examlex
The thoracic duct empties lymph into the:
Population Density
A measurement of the number of individuals living within a specific area, typically expressed as people per square kilometer or mile.
Critical Levels
Threshold values of pollutants or environmental conditions above which detrimental effects on specified sensitive elements of the environment are observed.
John Audubon
An American ornithologist, naturalist, and painter known for his studies, drawings, and paintings of North American birds.
Passenger Pigeons
A species of bird that once existed in enormous numbers in North America but went extinct in the early 20th century due to overhunting and habitat destruction.
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