1. Senses System

2. Mechanoreceptors
A mechanoreceptor is a sensory receptor that responds to mechanical pressure or distortion.
Also the most sensitive mechanoreceptors are the cochlea that are in our ears that converting air pressure waves to sound.

3. Thermoreceptors
Thermoreceptors are receptors that are sensitive to temperature change.
Thermoreceptors regulate our body’s temperature and can cause us to shiver if we are cool to get our temperature up, or can cause us to sweat if we are too hot.

4. Chemoreceptors
A chemoreceptor is a sensory organ that monitors the chemicals that are in your blood stream.

5. Photoreceptors
Photoreceptors are receptors that let you take in light through your eyes that allows you to be able to see.
Photoreceptors have a lot of mitochondria that have a high metabolic rate in which detect the smallest flicker in illumination.

6. Pain Receptors
Pain receptors are on the free nerve endings and are stimulated by harmful damage such as tissue damage.
Pain receptors are throughout your body and are on your organs.

7. Rhodopsin Rhodopsin allows you to see what you see now.
These are responsible for seeing everything, and these are the biological pigment of the retina.

8. Cell Signaling
Cells constantly receive signals from their environment and from neighboring cells to divide or not, and also if a pathogen is present then the cell will do a protective response.
Below is a picture that shows how cells signal each other.

9. References