The researchers injected stem cells from rats into the embryos of mice that had been genetically altered so they could not produce their own organs, creating mice that had rat organs.
The researchers say the technique could allow pigs to grow human organs from patient's stem cells for use as transplants.
By using a patient's own stem cells it could help to reduce the risk of the transplanted organ being rejected while also providing a plentiful supply of donor organs.
Current organ shortages mean that patients must endure long waiting lists for transplants."
King James Version (KJV)
19Ye shall keep my statutes. Thou shalt not let thy cattle gender with a diverse kind: thou shalt not sow thy field with mingled seed: neither shall a garment mingled of linen and woollen come upon thee.