Cells to Organisms - Human Body Systems

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Responsible for movement of the human body

Breaks down food into tiny molecules which allows the body to absorb nutrients

Acts as a barrier to protect the body from the outside world

Supplies the blood with oxygen in order for the blood to deliver it to all parts of the body

Transports oxygen and nutrients to the body and removes CO2

Secretes hormones to regulate metabolism, growth, sleep, and reproduction

Removes wastes from the bloodstream that can cause toxic build up

Produces eggs or sperm and nourishes offspring until birth