Bright red blood is called frank blood, its fresher. Dark red blood is older blood that has been sitting for a while. The colour of fresh blood, say from an open wound, can be different due to variances in the number of red blood cells that person has.
XX
...apparently! :)
some blood is dark red because its oxygen has been used up.
Venous blood is darker than other blood flowing throughout the body. This is due to the fact that blood inside veins is full of oxygen, which causes it to be a darker color.
likely because your blood has less oxygen than most... that or its having problems being filtered, or maybe high blood pressure there are many reasons it could be that way
Yes because when blood is sent from the heart through the lungs the blood is oxyginated and when it comes back through veins it has no oxygen in it so it is blue.
Veins can have different colors, depending on the oxygen level in the blood.
this blood contains Carboxyhemoglobin which makes it dark.
I think it is a natural happening in your veins. If not, blame the blood cells!
because this blood has a low oxygen content
There is some of both. If you think about it, that has to be true. It flows in, it flows out.
It's the amount of melanin in their skin; some have more than others, thus they are darker than others.
Bright red blood is called frank blood, its fresher. Dark red blood is older blood that has been sitting for a while. The colour of fresh blood, say from an open wound, can be different due to variances in the number of red blood cells that person has. why this blood dark red? The amount of haemoglobin (red blood cells) that are in a person can differ slightly, this may cause some peoples blood to be darker than others if its fresh, otherwise see above...
Some people have naturally darker skin than others. It all depends on what genes you end up with. Some white people have naturally darker skin, and some black people have naturally lighter skin.
Depends on the type of soil, environmental conditions, and additives.
Some peoples skin are darker due to the production of melanin which is made by melanocytes. When a person is in direct contact with the sun it triggers the production of melanin to be made.
because it depends if you have allot of dirt in your ear or if your ear is dirty
some muscles are red and others are blue of your blood
Blood
Because they are differrent species of ants. There are millions of different types. Or, if they are in the same nest it is because that the darker are the female, while the brighter are the male.
because some animals live in water and there blood is colder
Niall bleaches his hair, and some of the others have maybe been dying their hair a bit darker.