Siamese twins Abby and Brittany Hensel demonstrated how their bodies are connected in a recent video.

34-year-old conjoined twins Abby and Brittany Hensel, who have two heads attached to one body, with each sister possessing her own brain, heart, and other organs, posted a video for their 300 thousand TikTok followers, detailing how their body functions and how they are connected.

The sisters, who gained fame after a reality show, boast that their two brains and nervous systems are perfectly coordinated. They can write, eat, run, and drive, functioning both independently and in perfect synchronization.

In the video that Abby and Brittany shared with the public, their unique upper body areas are visible — two brains, two spinal cords, and two hearts. For instance, their two hearts are part of a shared circulatory system that includes the same veins and arteries, meaning that if one heart fails, it could affect blood flow and pressure in the other. If one heart malfunctions, the other may need to compensate for changes in circulation, potentially leading to additional strain.

They have one slightly elongated liver, larger than average, to meet the needs of both bodies, which are connected at the navel. The sisters also share one set of reproductive organs but have three kidneys — one on Abby's side and two on Brittany's side. This adaptation allows the kidneys to effectively filter waste from the blood, despite the common urinary system.

In infancy, the twins had a third arm removed. Now, each sister controls the arm and leg on her respective side, with Abby managing the right and Brittany the left.

Each twin also has two lungs, two esophagi, two stomachs, and one shared liver and small intestine. Thanks to their shared spinal cord, their nervous systems can communicate, allowing their different brains to exchange information and coordinate body movements.

The twins, who currently teach in Minnesota, first captured the nation's attention when they appeared on The Oprah Winfrey Show in 1996 at the age of six.

They are the rarest type of conjoined twins, resulting from a single fertilized egg that failed to completely separate in the womb. Only one pair of twins in 40,000 is born connected in some way, and just one percent of them live beyond a year.

The girls were able to play basketball and softball in school and obtained their driver's licenses at 16. Abby controls the pedals, while Brittany handles the turn signals, and both steer.

The sisters admit they have never even considered separation.

"We never wanted to be separated because then we couldn't do what we do now — like playing softball, running, and being active," Abby confessed in 2007. In 2021, she married nurse and Army veteran Joshua Bowling. Now both women aspire to become mothers.