which structure relies on the circulitory system to transport the chemical compounds that it makes to the other body structure
neuron
neuron transport the chemical compounds that it makes to other body structures.
I would say glands, such as the pituitary gland, which make chemical hormones that need the circulatory system to distribute them to the target organs.
Neuron is correct.
I disagree with ccraw19, The nervous system uses chemical messages(e.g. in transmission across synapses) but it does not use the circulatory system. Glands which produce enzymes(or hormones) like @natasha.galich said are however transported in the circulatory system.
Neurons do use chemicals, such a calcium and epinephrine, to transmit information but are not main producers of any of them.
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