Despite centuries of study, scientists are still finding new details and even overlooked structures within the human body. As researchers explore anatomical differences between individuals, it’s ...

Leaf through a textbook, watch a wellness influencer, or listen in at the gym, and it can feel as though the human body has already been mapped to exhaustion. Every muscle named, every nerve traced.

The human body contains ~27–37 trillion cells of up to 10,000 cell types (CTs) within a volume of ~62–120 liters (males) and 52–89 liters (females). The Human Reference Atlas (HRA) v2.3 provides a ...