Smart Doctor Plus on Instagram: "Close Up of a Beating Heart | (Full) 🫀 . . 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 fou

Astro Alexandra on Instagram: "The largest moon in the solar system may have STACKS OF OCEANS! Meet Jupiter’s moon Ganymede #space #astronomy #nasa #science"