Lyme disease in dogs: What dog owners should know

As Lyme disease cases rise in the U.S., humans are not the only ones at risk. Veterinarians with the Virginia-Maryland College of Veterinary Medicine say dogs are increasingly vulnerable to this tick-borne illness.

Supercomputer simulation reveals new mechanism for membrane fusion

An intricate simulation performed by UT Southwestern Medical Center researchers using one of the world's most powerful supercomputers sheds new light on how proteins called SNAREs cause biological membranes to fuse.

How a calcium-sensing protein multitasks

The calcium-sensing receptor is critical for maintaining healthy calcium levels, but CaSR is also well-known for its side hustles. The receptor is increasingly recognized for its ability to detect other ions and proteins ...

Study shows common water pollutants cause heart damage in fish

Recent findings highlight the persistence of dihalogenated nitrophenols (2,6-DHNPs) in drinking water, resisting standard treatments like sedimentation, filtration, and boiling. The research demonstrates the severe cardiotoxic ...

NASA touts space research in anti-cancer fight

Experiments in the weightless environment of space have led to "crazy progress" in the fight against cancer, NASA officials said at a recent event highlighting an important and personal initiative of US President Joe Biden.

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Heart

The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδιά, kardia, for "heart."

The heart of a vertebrate is composed of cardiac muscle, an involuntary striated muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.

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