The correct answer is the renal vein and the bowmans space
Nearly 99% of the mass of your human body consists of just 6 chemical elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Another 5 elements make up most of the last percentage point: potassium, sulfur, sodium, chlorine, and magnesium.
I believe the answer you are looking for is a cell cavity. Also known as: Cavity of cell, or cell space
