What prevents the food from entering the wind pipe?
Epiglottis
Larynx
what is the stable condition of an organism and of its internal environment?
Homeostasis
Negative feedback
Positive feedback
What are three components in tobacco?
Tar, Nicotine, Carbon Monoxide
Carbon Dioxide, Car, Alcohol
Ethanol, Carbon Monoxide, Tar
What is the top layer of skin?
Epidermis
Dermis
Sweat Pore
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