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The human body system that contains the heart, blood, and all of the blood vessels. It delivers all the nutrients to the cells and removes wastes
system responsible for taking in oxygen and releasing carbon dioxide using the lungs
Coordinates body's activities by detecting stimuli and directing the body's responses
the body's "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream.
a secondary circulatory system that helps the body fight pathogens and maintain its fluid balance
tissue that receives messages from the body's external and internal environment, analyzes the data, and directs the response
Voluntary, striated muscle that moves bones, works in pairs and is attached to bones by tendons
a chemical that serves as a messenger. Each hormone is secreted by a gland and travels to one or more target organs, where it brings about responses.
a connective tissue that is more flexible than bone and that protects the ends of bones and keeps them from rubbing together
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