If blood is red, why are veins blue?
If blood is red, why do veins look blue?
Is blood actually blue? Where does the statement that blood is blue come from? Is it really true? What is the meaning of bleed blue? Which veins carry oxygenated blood? Why do some people's veins appear through the skin on their hands, feet and forehead, but not on other people? Why are my veins very visible on my hands, arms, legs, and feet? If blood flows only in veins and arteries then why do we bleed on getting cut even though our veins/arteries are fine? What do veins and arteries do? Are purple veins under the tongue normal to have? Circulatory System: Why are red blood cells larger in veins than in arteries? Blood passes through arteries and veins. If so, then why do we bleed when hurt? Is purple veins under tongue normal to have? Why do doctors use veins rather than arteries to take blood samples? If blood in our body flows only in veins then why it flows out when our finger is cut slightly? What color is blood in the body? If blood in our body flows only in veins then why it flows out when your finger is cut slightly? Why are there different blood types? What do you call an inflammation of veins? Who do I get big veins which look clear on my hands or arms? What does it mean if your blood is bright red? Why are some blood types rare? Why do I see red and blue spots when I get dizzy? Why don't we feel or hear blood flowing in our veins, and our heart pumping blood? Why do colors look more red in one eye and more blue in the other? Are there any veins in the lower arms? Why do we bleed? What form is venous blood in the flow of blood? Why is my blood dark red? What is the true colour of human blood? It appears red because of Oxygen. What is its colour without O2? Why are my blood clots so big?