Name: Milk Is Just Filtered Blood
Uploaded: 2018-04-14T10:26:14.000Z
Duration: 2 min 43 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

Supermarkets have lots of milks to choose
from these days, many of which are the product

of blending up and straining various nuts
and seeds.

Plain old milk milk, on the other hand, is
also a strained product - it's filtered

As weird as this seems, all mammal milk is,
in fact, made from blood, because blood contains

lots of nutrients, and baby mammals need lots
of sugar, fat, and protein to grow complex

But mammal mammas can't just open an artery;
that would be dangerous.

Plus, most of the useful nutrients in blood
are too dilute and blood has too much iron

This is where the mammary gland comes in:
It's full of thousands of tiny sacs whose

walls have special cells that grab water and
nutrients from passing blood, do some chemistry

on them, and pass them to the inside of the
sacs where they mix together to become milk.

When a baby starts to suckle on the teat,
its sucking pattern tells the mom's brain

to the hormone release oxytocin, which attaches
to the sacs, causing them to squeeze out the

tiny droplets of milk into the baby's mouth.

Each mammal species tailors its blood-filtering
recipe to the needs of its babies.

For example, to help their Arctic-dwelling
pups pack on the blubber, hooded seal moms

produce a milk with 15 times the fat of cow
milk.

Cottontail moms make high-protein milk for
their bunny babies, allowing them to develop

The tammar wallaby can make two different
types of milk in two different teats at the

same time - one high in sugars for a newborn
in the pouch and one high in fat and protein

And while selectively bred modern dairy cows
don't have a particularly wacky recipe for

The current record holder - a Holstein named
Aftershock - can produce a bathtub full of

This video is sponsored by Honey, a free browser
extension that looks for ways to save you

You can install Honey with just two clicks
of the mouse by going to joinhoney.com/minuteearth.

After that, any time you go through the checkout
process at an online store, Honey will automatically

apply the best coupon code it can find to
give you the biggest discount.

Last week, the MinuteEarth team saved seven
bucks on this amazing chart of cosmic exploration

And Honey doesn't make money by selling
your personal data; instead, it collects a

small commission from some merchants for bringing
them customers.

To join the nine million other people using
Honey to save money online - and to support

our channel - go to joinhoney.com/minuteearth.