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.



Jeddah’s City Walk Reopens with Expanded Entertainment Experience

Jeddah’s City Walk reopens with expanded entertainment experience. (SPA)
Jeddah’s City Walk reopens with expanded entertainment experience. (SPA)
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Jeddah’s City Walk Reopens with Expanded Entertainment Experience

Jeddah’s City Walk reopens with expanded entertainment experience. (SPA)
Jeddah’s City Walk reopens with expanded entertainment experience. (SPA)

The City Walk zone in Jeddah reopened on Wednesday, offering a wide array of entertainment options, interactive experiences, and family-friendly activities as part of this year’s Jeddah Season.
Spanning more than 281,000 square meters, the zone features several themed areas, including Cairo Nights, Wonder Wall, The Garden, Adventure Land, and Horror Village. It also includes 77 retail outlets, 65 restaurants and cafes, and 81 games, along with 10 immersive experiences and a lineup of theatrical and musical performances, the Saudi Press Agency said on Thursday.
Organizers say this year’s edition of the City Walk introduces a refreshed layout with new interactive zones and expanded experiences, such as horror houses and adventure-themed attractions designed for all age groups.
The City Walk aims to showcase Jeddah’s cultural vibrancy through its culinary offerings and entertainment options, while reflecting the zone’s evolving identity as a leading destination for regional tourism.
Jeddah Season continues to position Jeddah—known as the Bride of the Red Sea—as a hub that blends culture, sports, and entertainment. The event features first-time attractions and highlights Jeddah’s rich history. Organizers aim to enhance Jeddah’s regional standing, attract local and international visitors, stimulate tourism, and support economic growth through job creation and urban development.