viens
Veins are the vessels that carry blood often described as bluish in color. This coloration is due to the deoxygenated blood returning to the heart, which has a lower oxygen content and appears darker. The blue appearance is also a result of how light penetrates the skin and reflects off the blood. However, it's important to note that blood itself is always red; the bluish color is an optical illusion.
The blood in veins appears bluish because of how light interacts with the skin and the blood vessels. The oxygen-depleted blood in veins absorbs more red light and reflects more blue light, giving it a bluish hue when seen through the skin.
capillary vain
The blood in veins appears bluish because of how light interacts with the skin and blood vessels. Oxygen-rich blood is actually red, but when it travels through veins, the skin absorbs red light and reflects blue light, making the blood appear blue.
Either it is just capillary damage or a vein.
Uranus is bluish-green because of methane gas in the atmosphere.
Capillary
Capillary
The blood that passes through the liver is deoxygenated blood (there is no oyygen in the blood when it passes through the liver as it has been used up by other cells, tissues and organs), therefore the liver appears blue.
Dilation of a blood vessel is the term for physiologic widening of the vessel. Abnormal widening of the blood vessel through a weakening of the wall is known as aneurysm.Dilation of a blood vessel means widening of the vessel.
Blood vessel on the bottom of a worm Blood vessel on the bottom of a worm
Oxygenated blood is red, and turns blue as the blood delivers its oxygen to tissues. By the time it reaches the heart, it is in a state of lowered oxygen levels, and the heart pushes it to the lungs where it may reoxygenate.