Name the human tissues that contain about 85% water:

Explanation

The correct answer is brain cells. Brain cells, or neurons, have a high water content of approximately 85%, which is vital for their role in transmitting signals throughout the nervous system. Muscle cells also contain a significant amount of water, around 75%, but less than brain cells. Bone cells have a much lower water content, around 20%, due to their dense mineral composition. Therefore, the only tissue from the options provided that matches the high water content requirement is brain cells.