How strongly it's turned on determines how much pigment cells in our eyes make.

它强弱决定了我们色细成量。

" And they do this by moving pigments within specialized skin cells called chromatophores."

“它们通过转移特定皮肤内细内色来实现。”

Cuttlefish have millions of color cells in their skin.

乌贼皮肤中有数百万个色细。

During pregnancy, all the hormones can make it so that melanocytes come to the surface, not only in that linea nigra, but you can notice darker areas in your skin and your face and other places.

怀孕期间，激会使黑色细更加活跃，不仅会在妊娠中线处显现，还可能导致皮肤、面部和其他部位得更深色。

A senior investigator on the study, Mayumi Ito, said: " It is the loss of chameleon-like function in melanocyte stem cells that may be responsible for greying and loss of hair colour."

该研究高级研究员伊藤真由美（音译）表示：“黑色干细色功能丧失可能是导致头发白和褪色原因。”

So, those little brown spots on your skin we call freckles are really just clumps of cells that produce extra melanin to protect you from the sun.

因此，你皮肤上那些我们称之为雀斑小褐斑，其实只是产生额外黑色细团，目是为了保护你免受阳光照射。

In addition, iron is also an important part of proteins like myoglobin, which delivers and stores oxygen in muscles; and mitochondrial enzymes like cytochrome oxidase, which help generate ATP.

此外，铁也是某些蛋白质重要组成部分，如肌红蛋白；肌红蛋白在肌肉组织内起转运和贮存作用；铁还是线粒体酶组成部分，如辅助产生ATP细色酶。

So they decided to take a closer look at those stem cells that give rise to melanocytes-the cells that pump pigments into each hair follicle.

因此，他们决定更仔细地研究产生黑色细干细，黑色细是将色注入每个毛囊细。

As we get even older, the pigment-producing cells in our follicles retire–and while our hair continues to grow, it comes in pigment free.

随着年龄增长，毛囊中产生色细会逐渐消失——当我们头发继续生长时，它就不含色了。

Squid skin contains thousands of tiny organs called chromatophores, each made of black, brown, red or yellow pigments and ringed in muscle.

乌贼皮肤含有数千种称为色细微小器官，每种颜色均由黑色，棕色，红色或黄色色制成，并在肌肉中环绕。

Coat colour, an important consideration for many owners, is easily dealt with by picking the right pattern of melanocyte cells in the skin.

许多宠物主人都比较在意动物皮毛颜色，要打印出不同颜色只需要在皮肤中选取合适黑色细排列式就能轻松实现。

" If our conclusions about the chromatophores are correct, this is a beautiful example of innovation in evolution, " she said.

" 如果我们关于色细结论是正确，这就是进创新一个很好例子。"

She said: " Once they're gone, you can't regenerate pigment any more. The damage is permanent."

“一旦消失，你色细就无法再生。这种损害是永久。”

The peripheral blood smear shows microcytic, or small, and hypochromic, or pale, RBCs.

外周血涂片可见小细低色性（小而苍白）红细。

The chemical then flowed through the stem cells up into the hair follicles -- where melanocytes are kept.

然后，这种学物质会流过干细，流至头发皮囊--生黑色细就得以保留。

For years we thought that there was a simple well-established mechanism for this color

原理来色。在它们皮肤里，色龙 有拥有不同颜色色细。

The melanocytes make the pigment, which is then packed into small packets of pigment called melanosomes.

黑细制造色，然后将其包装成称为黑体小包色。

The iris contains cells that contain a pigment called melanin and there's no blue melanin.

虹膜细含有一种叫黑色细，但是蓝色是不存在。

First, they thought it could be the immune system attacking the melanocyte stem cell population.

他们一开始认为可能是免疫系统攻击黑色细干细群。

It's part of something called the cytochrome P450 system.

它涉及一种叫做细色 P450 系统机制。