Snakes have a tympanum next to their eyes that helps detect infrared waves. This is one way in which the snake makes up for not having ears.
for a student in highschool your teacher will probably call it a "pit" but in the higher level of education i'm not completely sure or the full answer
heat pits
Electrical signals
There are several different organs in an animal that are considered edible. These organs are called the kidneys, liver, heart, brain, and stomach.
They use them for the same thing humans use them for.
The heat is generated by the body's metabolic processes, and the various reactions are regulated by the hypothalamus in the brain. Most of the heat is generated from the internal organs, about 16% by the brain itself.
Yes, spaying a female cat will stop her coming into heat, as the procedure involves the removal of the entire reproductive organs.
Electrical signals
Rattlesnakes don't have eyesight that is great, but they can see and detect movement. They can certainly feel the vibrations of your movements through the ground and taste you on the air with their tongue. In addition, they can sense you via infrared (heat) detecting organs located in pits in front of their eyes. (The rattlesnake is a pit viper, and it gets that name from the "pits" which are the openings to the heat sensing organs.) A link is provided to a picture of a pit viper on Wikipedia. The pits are clearly visible.
they detect the feelings of pain cold and so on
Angiography is used to detect abnormalities or blockages in the blood vessels (called occlusions) throughout the circulatory system and in some organs.
Heat
Insects like grasshoppers have heat receptors in their body to detect heat. They also have antennas which help them detect movement and vibrations.
To detect heat obviously.
They detect heat
One can detect heat sensors by searching their surroundings. Often, heat centers are located on ceilings in most rooms, and especially concentrated in areas such as the kitchen.
Mediastinoscopy is most commonly used to detect or stage cancer. It is also ordered to detect infection, and to confirm diagnosis of certain conditions and diseases of the respiratory organs.
The presence of light and our visual organs that detect that light.
In your reproductive organs, cervix and vagina.