The Internet is chock-full of information about the human heart. It offers an ever-growing body of content that explores heart health, disease, structure, rhythm, and other topics. It is important to be cautious and not believe everything presented online: some sites contain reliable information and some do not. Continue reading
The human heart has a great sense of rhythm. Its two internal nodes generate electrical signals to contract the heart in sequence. The contractions are heartbeats that keep blood flowing throughout the body. They can be regular or irregular, but normal heart rhythm has a regular, steady pace. Continue reading
Recently, I read that the human heart is about the size of a fist. I made a fist, looked at it, and pondered. My fist is smaller than my brother’s, but it’s larger than my friend Julia’s.
My brother is larger than me and Julia is smaller—very petite. Those differences made me curious. I wondered about the size of the human heart, and factors that affect it. Continue reading
It is good to understand what the human heart looks like and how it functions. That makes it easier to take care of it and realize when it needs attention.
Every part of the body uses and releases substances the blood carries:
- Gasses, such as oxygen and carbon dioxide
- Minerals, such as sodium and potassium
- Fats, such as cholesterol and triglycerides
- Sugar, which is glucose
and other substances. Some things blood-transports are nutrients and some are waste products. Nutrients include glucose and waste products include carbon dioxide. Continue reading