Which body systems are involved in the removal of waste? Choose more than one answer.
Skeletal
Excretory
Respiratory
Reproductive
Digestive
Integumentary

excretery because it has the parts of the body which help to excrete waste that forms in our body

i think that the best answer would be c.

tell me if im wrong : )

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .