Humans consist of complex physical materials. However, we determine and experience our lives through numerous spiritual moments. Should consciousness be described as an outcome of physical matter and senses, or is is a higher mental construction?
Consciousness is a specific kind of perception, a perception of your thoughts. You can describe it as an eyeball/ear that seas/hears the environment in your brain or as a computer algorithm where the (several stages of) outputs are fed back into the input.
Since there is cosmic consciousness, it is not worth dealing human consciousness separately. You know, even the answers to many questions regarding death is still completely unknown. The same will be the case of consciousness also. This is because of that great cosmic consciousness. We can never deny the fact that even in unicellular organisms like bacteria and viruses have consciousness. Then you can make sure that consciousness has no relation to the number of cells or its complexity. Consciousness is everywhere; in animate objects, inanimate objects, tangible, intangible and everywhere.
The following link is just for giving you some hints.
Should consciousness be described as an outcome of physical matter and senses, or is it a higher mental construction?
He who can look into himself realizes this Truth. When he realizes it, he knows his consciousness is everywhere and everything ( https://www.speakingtree.in/allslides/sarvam-khaluidam-brahma )...and he attains liberation from all bondage. Now you may think about: "What happens to consciousness even if his body becomes no more?"