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hoa [83]
3 years ago
9

which system is responsible for defending the body against harmful substances? A circulatory system B muscular system C endocrin

e system D immune system
Biology
2 answers:
kicyunya [14]3 years ago
6 0
D) the immune system
balandron [24]3 years ago
3 0
D, the immune system is responsible for defending the body
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Sensory receptor cells convert a stimulus, such as an odor molecule or light, into an electrical signal that is conveyed to the
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H2 is a molecule, but H2O is a _____. diatomic molecule compound neuron photon
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Compound.

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If a molecule consists of 2 or more elements its a compound.

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