Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them. They help to connect your arteries and veins in addition to facilitating the exchange of ...

Memory is the way your brain takes in and stores information so you can use it later on. Memories define who you are in a lot of ways. They help you recall things like important dates, facts, and even ...

Runners need to get enough protein for muscle repair and proper cell function. There are many different types of protein sources out there—some are animal-based, while others are plant-based. You need ...

Humans are complex organisms made up of trillions of cells, each with their own structure and function. Scientists have come a long way in estimating the number of cells in the average human body.

Emotions are how you respond to the world around us. They’re an important part of your daily functions and help shape you into who you are. They also contribute to the quality of your life. Emotions ...