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allergic reaction to certain allergens such as pollen. It causes sneezing, a runny nose and...
all types of waste that pose a significant threat to people and the environment.
a sudden severe instance of abnormal heart function accompanied by chest pains and possible...
a system of veins which carries blood from the digestive tract to the liver.
the blood vessel that carries blood from the digestive tract to the liver.
the blood vessel that carries blood from the liver to the inferior vena cava.
is the passing of traits to the offspring from its parents or ancestors. The study of heredity...
nutrients are obtained by digesting organic compounds that have to be acquired and ingested by...
organisms that are unable to produce their own organic food and must therefore obtain nutrients...