A new rule from the Biden administration allows organ transplants from HIV-positive donors to HIV-positive recipients.

Nearly any vessel can be tied off gradually and system can enlarge alternate routes. Blood can, and does, flow in either direction in several vessels. Blood can be diverted towards or away from any ...

Doctors' union the British Medical Association (BMA) and politicians alike have called for an opt-out system to be adopted in England, where people's consent to donate their organs after their ...

The digestive system is the series of tubelike organs that convert our meals into body fuel. There are about 30 feet (9 meters) of these convoluted pipeworks, starting with the mouth and ending ...

Cells in multicellular plants and animals are arranged into tissues, organs and organ systems. Cells. Tissues. Organs. Organ systems. And the organism itself. Cells are the building blocks of life.

An examination of the roles of organ systems in maintaining life and health in mammals, including humans, with emphasis on the alignment between structure and function. Topics include the functions of ...

Unlike mammals, birds lay eggs and initial stages of development occur outside the mother’s body. Reproductive system of birds The gonads develop from two sources during embryonic development. When ...

multi-cellular in vitro systems that commonly include three-dimensional aspects, fluid flow, changing pressure or stretch, and multi-organ interactions. These systems are being developed to better ...