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In systemic circulation, blood returns from your abdomen through the inferior vena cava to the _____________.
an Engllish surgeon that recognized the relationship between the death rate and the degree of cleanliness in surgery in the 1800's
Your _____________is made up of cells, tissues, organs, and body system that fight foreighn organisms.
Your circulatory system contains _________blood cells that surround an digest foreign organisms and chemicals as they enter the body.
In the digestive system,
(a)________in your mouth, stomach, pancreas, and
______________in your stomach kills bacteria that enter your body on the food that you eat.
When you do get sick, your body has defenses in the form of
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