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Amid the FDA’s push to move away from animal testing, a Boston biotech is launching new organ-on-a-chip technology.

Two of the more promising approaches involve tools known as “organs-on-a-chip” and organoids. Organs-on-a-chip are miniature devices that use human cells to mimic organs.

A startup seeking to replace animal testing with a sophisticated high-tech platform has raised $40 million to develop lab-grown organs.

There were more than 48,000 organ transplants in the United States last year. They’re commonplace now, but the practice was considered experimental only a half-century ago.

Custom organs “Multiple shots on goal” is how geneticist Dr. David Ayares describes United Therapeutics’ approach to the future of organ transplantation.

Early in the 20th century, Dr. Mathieu Jaboulay turned the idea into action with one of the first well-documented attempts to make an animal organ work for a human.