In the intricate symphony of human physiology, few instruments play a more pivotal role than the heart. A marvel of ...

The vagina is a muscular tube that leads from the cervix to the outside of the body. A penis goes into the vagina during sexual reproduction. This is also where menstrual blood leaves the body and ...

Every day, the human male produces hundreds of ... By the time the surviving sperm reach the fallopian tube, where they are safe from the white blood cells, there could be as few as 20 left.

"You can print a tube or a blood vessel." The cells then multiply and grow inside the printed structure. "We grow them under the pulsatile pressure to mimic the human's blood pressure," Dai says.