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Scientists 3D Print Human Heart Muscles

A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)
A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)
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Scientists 3D Print Human Heart Muscles

A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)
A human embryonic stem cell line derived at Stanford University. (REUTERS/Julie Baker/Stanford University School of Medicine/California Institute for Regenerative Medicine/Handout)

Heart diseases are the leading cause of death in the United States killing more than 600,000 people a year. A team of researchers at the University of Minnesota has 3D printed a functioning human heart pump in the lab, which could help save the lives of thousands of patients.

According to the Science Daily website, the researchers used a type of stem cells with the potential to develop into any type of cell in the body, in addition to a mix of proteins, and the printer's ink.

The heart muscle model is about 1.5 centimeters long and was specifically designed to fit into the abdominal cavity of a mouse for further study, the German News Agency reported.

The team said the new muscle can be used to study the functions of the heart, and the problems that might affect it.

Brenda Ogle from the Department of Biomedical Engineering in the University of Minnesota College, said this is a critical advance in heart research because this new study shows how we were able to 3D print heart muscle cells in a way that the cells could organize and work together.

"We now have a model to track and trace what is happening at the cell and molecular level. We can introduce disease and damage into the model and then study the effects of medicines and other therapeutics," she explained.

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King Charles Warns of War’s ‘True Cost’ at VJ Day’s 80th Anniversary

Britain's King Charles records a VJ Day message in the Morning Room of Clarence House, in London Britain, August 14, 2025. (Reuters)
Britain's King Charles records a VJ Day message in the Morning Room of Clarence House, in London Britain, August 14, 2025. (Reuters)
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King Charles Warns of War’s ‘True Cost’ at VJ Day’s 80th Anniversary

Britain's King Charles records a VJ Day message in the Morning Room of Clarence House, in London Britain, August 14, 2025. (Reuters)
Britain's King Charles records a VJ Day message in the Morning Room of Clarence House, in London Britain, August 14, 2025. (Reuters)

Britain's King Charles on Friday released a message commemorating the 80th anniversary of VJ Day, which marks the Allied victory over Japan and the end of World War Two, reflecting on current conflicts and warning that the cost of war reaches far beyond battlefields.

While fighting in Europe ended in May 1945, the conflict with Japan continued until it signaled its intention to surrender on August 15 that year after atomic bombs were dropped on Hiroshima and Nagasaki by the United States.

Charles said the war's final act brought an "immense price" for Hiroshima and Nagasaki, one he prayed no nation would ever pay again.

Charles will be joined by his wife Queen Camilla, British Prime Minister Keir Starmer, the Japanese ambassador and veterans for a National Service of Remembrance to pay tribute to those who were killed in the last three months of the war.

There will be a flypast featuring historic military planes, a two-minute silence at midday and famous buildings across the country will be lit up to mark the occasion.

The monarch used his six-minute address to highlight ongoing conflicts: "War's true cost extends beyond battlefields, touching every aspect of life, a tragedy all too vividly demonstrated by conflicts around the world today."

He said that in World War Two, nations that had never fought side by side learned to work together, proving "that in times of war and in times of peace, the greatest weapons of all are not the arms you bear, but the arms you link".

"That remains a vital lesson for our times," he added.

Starmer said in a statement the "country owes a great debt to those who fought for a better future, so we could have the freedoms and the life we enjoy today".

At dawn military bagpipers performed at The Cenotaph war memorial in central London, at Edinburgh Castle and the National Memorial Arboretum in central England where the service of remembrance will be held later, the government said.

A piper was also expected to perform at a Japanese peace garden to recognize the reconciliation between Britain and Japan in the decades since the war ended.

On Friday evening, dozens of buildings and locations across the country including Buckingham Palace, the Houses of Parliament, the Tower of London, and the White Cliffs of Dover will be illuminated to mark the anniversary.