Receptors that provide animals with information from their internal environment are located in B. BLOOD VESSELS AND ORGANS.
Chemo receptors - neurons that detect chemicals
mechanoreceptors - neurons that detect touch
olfactory receptors - neurons that detect smell
photoreceptors - neurons that detect light
thermoreceptors - neurons that deted temperature
receptors that provide animals with information from the external environment are located in their ears,skin, tongue, eyes, nose