How many senses do we have?

We are able to discern external stimuli and internal stimuli.

External stimuli grasp with the bodies of the known five senses (sight, hearing, taste, touch and smell).

We realize internal stimuli through other senses such as interoception. Hunger, sleep, thirst, etc.

By proprioception, we realize the position of the different segments of the body (head, torso, arms, legs ...).

Nociception, it tells us what is harmful for our body and causing pain alerts us. Detects mechanical, chemical and thermal stimuli that could damage our tissues.

The Magnetocepción allows us (by the magnetic fields of the earth), realize the height and the angle at which we are located. It is very marked in birds and insects. 

So the classical five senses, we must add them these others and some more that are under consideration.