Give some stream of consciousness and then the answer. For humans, the head and particularly the face are the main distinguishing feature between different people, due to their easily discernible features such as hair and eye color, nose, eye and mouth shapes and wrinkles. The human head typically weighs between 5 and 11 pounds (2.3 and 5.0 kg). Human faces are easily differentiable to us due to our brains' predispositions toward discriminating human facial forms. When observing a relatively unfamiliar species, all faces seem nearly identical, and human infants are biologically programmed to recognize subtle differences in anthropic facial features.

Based on this passage, what is the average weight of human head?
The relevant sentence in the passage is: The human head typically weighs between 5 and 11 pounds (2.3 and 5.0 kg).
Therefore, the answer is between 5 and 11 pounds ( 2.3 and 5.0 kg ).