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The extracellular matrix appears to inhibit regeneration; but scientists debate whether heart muscle really comes back.  

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image: Image of the Day: Cold Hearted 

Image of the Day: Cold Hearted 

By The Scientist Staff | January 22, 2018

Cardiologists have found a way to cool the human heart in a localized way to help reduce muscle damage from heart attacks. 

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Research in human patients and mice reveals the role of the circadian clock in the risk of heart damage at different times of day.

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image: Infographic: Macrophages Around the Body

Infographic: Macrophages Around the Body

By Claire Asher | October 1, 2017

In addition to circulating in the blood as immune sentinels, macrophages play specialized roles in different organs around the body.

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image: Macrophages Are the Ultimate Multitaskers

Macrophages Are the Ultimate Multitaskers

By Claire Asher | October 1, 2017

From guiding branching neurons in the developing brain to maintaining a healthy heartbeat, there seems to be no job that the immune cells can’t tackle.

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image: Image of the Day: Heart Shapes

Image of the Day: Heart Shapes

By The Scientist Staff | September 29, 2017

High-resolution MRI reveals that human fetal hearts rapidly develop their major structures within a four-day period.

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image: Image of the Day: Mitochondria, Live and in Color

Image of the Day: Mitochondria, Live and in Color

By The Scientist Staff | September 27, 2017

Mitochondria age differently depending upon whether they’re located in the liver, heart, or kidney, scientists find in flies and mice.

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image: Image of the Day: A Heart is Born

Image of the Day: A Heart is Born

By The Scientist Staff | August 28, 2017

To track distinct populations of developing cardiovascular cells, scientists used pulses of electricity to introduce fluorescently labeled DNA into chick embryos.

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image: Heart’s Backup Pacemaker Mechanisms Identified

Heart’s Backup Pacemaker Mechanisms Identified

By Diana Kwon | July 28, 2017

The sinoatrial node is home to multiple pacemakers that keep the heart beating if the main one falters.

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image: Scientists Create See-Through Hearts

Scientists Create See-Through Hearts

By Diana Kwon | July 13, 2017

A new tissue-clearing technique reveals blood vessel networks and collagen scaffolds of dog and human cardiac tissue.

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