Answer:
The skin sensors
Explanation:
The skin sensors are in the cutaneous and subcutaneous tissues. Inside them, there are various nerves and receptors that can be divided in three groups: mechanoreceptors, nociceptors and thermoceptors. The thermoceptors are the receptors that specify in the acknowledgement of different types of temperatures such as hot and cold. If we touch something with high temperatures (hot or cold) those are the sensors that send the message to our brain.
Anyone 18 and over didnt have to go into the military