469K views · 1.1K reactions | With the new series of Sex Education just days away, let's take a look back at the cast seeing their billboard for the first time last year. S2 is back 17 January. | Netflix | Facebook

The Hidden Is More Immense | Female Anatomy ✨ . . The human heart is a vital organ that pumps blood throughout the body, supplying oxygen and nutrients while removing carbon dioxide and waste products. Here are some key points about the human heart: Anatomy: The heart has four chambers: two upper atria and two lower ventricles. The right side pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body. Valves: There are four main valves (tricuspid, p