The cardiovascular system is made up of your heart and your blood vessels. This heart anatomy diagram shows that blood flows from the right atrium into the right ventricle and out to the lungs ...

The endocrine system is a collection of many different endocrine glands, such as the thyroid gland, testes, and pituitary gland, which secrete hormones directly into the bloodstream. Your ...

Here’s everything you need to know about the endocrine system, its function, anatomy, and how to keep ... to create and release hormones into the bloodstream while monitoring their levels ...

Hepatic veins are blood vessels that return low-oxygen blood from your liver back to the heart. The veins are key players in the supply chain that moves the blood that delivers nutrients and ...