Thyroid hormones are important in brain development by regulating cell migration and differentiation, synaptogenesis, and myelination The early steps of embryonic neural development, such as neural ...

The lower esophageal sphincter (LES) keeps stomach acid and food from backing up into your esophagus (feeding tube). A weak lower esophageal sphincter can cause acid reflux, heartburn, and GERD.

The heart pumps deoxygenated blood to the lungs through the right side and oxygenated blood to the body through the left. The heart has four valves that make sure blood flows in one direction. Blood ...