From which structures do oxygen molecules move from the lungs to the blood?
a. bronchi
b. trachea
c. nose
d. bronchioles
e. alveoli
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What is used to keep track of the gamates and possible offsprings combination

To take a whiff of your favorite food, you use both? a. motor nerves and your digestive system b. sensory nerves and your immune system c. motor nerves and your skeletal system d. sensory nerves and your respiratory system

How do demetri's results show that digestive enzymes are crucial to maintaining homeostasis inside the body?