Healthy veins and diseased veins look distinctly different. Diseased veins are characterized by malfunctioning vein valves, which you can see allow blood to flow in the opposite direction than it should. Healthy veins, however, have strong vein valves that allow for proper blood flow.
https://www.youtube.com/watch?v=z5huqFcql2c
Konten yang diunggah akan dipindahkan ke album yang baru dibuat ini. Anda harus buat sebuah akun atau masuk jika ingin mengedit album ini nanti.