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Detailed explanation-1: -The interstitium, scientists found, is under our skin and between our organs. Understanding it may eventually help treat disease.

Detailed explanation-2: -A new organ has been discovered hiding in plain sight inside the human body. Known as the mesentery, it was previously thought to be just a few fragmented structures in the digestive system. But scientists have realised it is in fact one, continuous organ.

Detailed explanation-3: -The team has dubbed the glands “tubarial glands” for their location within the body. They’re about the same size as the body’s three main salivary glands but sit on either side of the nasopharynx, which connects the nasal passages to the rest of the human body’s respiratory system.

Detailed explanation-4: -With all that’s known about human anatomy, you wouldn’t expect doctors to discover a new body part in this day and age. But now, researchers say they’ve done just that: They’ve found a network of fluid-filled spaces in tissue that hadn’t been seen before.

Detailed explanation-5: -That fluid and the tissues connecting them are called the interstitium (pronounced “inter-STISH-um"), and they’re found throughout the body, both just below the skin and in the digestive, respiratory and urinary systems.