Why Do Some Babies Have Hair in Their Bodies

Mammals

A mammal is an animate being that feeds its babies with milk when it is immature. There are over 4,500 types of mammals. Many of the most pop animals we know are mammals, for instance, dogs, cats, horses, cows, but exotic animals like kangaroos, giraffes, elephants and anteaters belong to this group, too. Humans are besides mammals.

Mammals live in all regions and climates. They live on the footing, in trees or secret. Polar bears, reindeer and seals are mammals that live in the Arctic regions. Others, like camels or kangaroos prefer the world's dry areas. Seals and whales are mammals that swim in the oceans; bats are the only mammals that can fly.

Mammals have five features that make them different from other animals:

• Female mammals produce milk and feed their babies with it.
• Only mammals have hair or hair-like skin. All mammals have hair at least some time in their lives.
• Mammals are warm-blooded. Their body temperature always stays the same and does not alter with the outside temperature.
• Most mammals take a larger and well-developed brain. They are more intelligent than other animals.
• Mammals protect their babies more than than other animals. They prepare them for futurity life.

People have hunted mammals for ages. They ate their food and made dress out of their skins. Thousands of years ago wild mammals were domesticated and gave human beings milk, wool and other products. Some mammals, like elephants and camels are all the same used to transport goods. In poorer countries farmers apply cows or oxen, to turn fields.

Today some mammals are hunted illegally. Whales are killed because people desire their meat and oil, elephants are killed for the ivory of their tusks.

Mammals are often kept every bit pets. Among them are cats, dogs, rabbits or guinea pigs.

Mammals are useful to people in many other means. Some help plants abound and eat harmful insects. Others eat weeds and prevent them from spreading too far. The waste product of mammals is used equally fertilizers that better the quality of soil.

Types of mammals

Mammals are divided into three groups:

1. Monotremes are mammals that lay eggs, like a bird. They live in Australia and New Zealand. The platypus belongs to this group
2. Marsupials are mammals that raise their young ones in a pouch in their bodies.
3. Placentals are the largest group of mammals. The babies abound within their mothers until they are ready to exist born. Humans are placentals.

Mammals and their bodies

Skin and hair cover a mammal'south body. Some mammals have horns, claws and hoofs. The hair or fur of a mammal has many functions. The color often blends in with the earth around them and allows them to hide from their enemies. Some mammals produce needles or sharp pilus that protects them from assault. But the principal office is to keep the body warm.

Mammals have glands that produce substances that the trunk needs like hormones, sweat and milk.

A mammal'due south skeleton is made up of three parts:

1. The skull contains the brain, teeth and other organs.
2. The spine or backbone enables mammals to stand up or walk.
3. Limbs are legs and arms of a mammal, often with stiff bones.

Mammals have a four-chambered middle organisation that pumps claret into all parts of their body. The blood brings oxygen to muscles and tissue. The reddish blood cells of mammals can carry more oxygen than in many other animals. Because mammals take a high body temperature they must burn a lot of food.

Mammals digest food through their digestive system. Later nutrient is eaten through the rima oris it goes down the pharynx into the stomach and passes through the intestines. Mammals that swallow plants take a complicated arrangement with long intestines that help break downward food. Mankind is easier to assimilate then meat-eating mammals have a simpler stomach.

Mammals breathe air through their lungs. Most of them take noses or snoutswith which they accept in air. Dolphins and whales breathe through a hole in the top of their back.

A whale bravado air out of its body - Aqqa Rosing-Asvid

Mammals and their senses

Mammals have five senses that tell them what is happening in their surround. Not all senses are developed equally amid mammals.

Mammals rely on scent to observe food and warn them of their enemies. Many species use odor to communicate with each other. Humans, apes and monkeys have a relatively bad sense of smell.

Taste helps mammals place the nutrient that they eat. Well-nigh mammals have a good sense of hearing. Some mammals use their hearing to observe objects in the night. Bats, for instance, utilize sounds to navigate and detect tiny insects. Dolphins also apply such a  arrangement to discover their fashion around.

While higher primates, like humans, apes and monkeys have a highly developed sense of sight other mammals are well-nigh blind. Almost of these mammals, like bats, are active at nighttime.

Mammals have a good sense of touch. They have nerves on all parts of their body that let them feel things. Cats and mice take whiskers with which that they can feel themselves effectually in the nighttime.

What mammals consume

Herbivores are mammals that eat plants. They have special teeth that allow them to chew food better. Examples of herbivores are deer, cows and elephants. The behemothic panda is a plant eater that only eats bamboo.

Carnivores are mammals that eat other animals. Cats, dogs, tigers, lions, wolves belong to this group. They are hunters that tear their prey autonomously with sharp teeth. They do not chew their nutrient very much.

Omnivores are mammals that eat plants and meat. Bears, , apes, pigs and humans are examples of omnivores.

How mammals move

Nearly mammals live and movement on the ground. They have four legs and walk past lifting ane human foot at a fourth dimension or by trotting. Kangaroos hop and use their tail for balancing.

Mammals that live in forests spend a lot of their fourth dimension in trees. Monkeys tin grasp tree branches with claws and can hang on to them with their curved tail. Often mammals spend time hanging upside downward in copse.

Dolphins and whales are mammals that live and move effectually in h2o. Instead of limbs they accept flippers which they use to move frontwards. Other animals, like the hippopotamus, merely spend some time in the water.

Bats are the only flying mammals. Their wings are made of skin stretched over their bones. They can fly by beating their wings upward and downward.

Gophers and moles are mammals that spend most of their life underground.

How mammals have babies

Mammals reproduce when a male's sperm gets into contact with a female egg and fertilizes it. A young mammal grows inside the female'due south body. Before this can happen mammals mate. Males and females stay together for a sure time.

Unborn mammals live their female parent's body for different periods of time. While hamsters are built-in afterwards just 16 days, it takes elephants 650 days to requite nascency. Man pregnancies final about 9 months.
Many new-built-in mammals, like horses and camels, can walk and run shortly after they are built-in.

Marsupials give nascency to babies that attach themselves to their mothers. They stay in pouches considering they are too weak to live alone. Well-nigh all marsupials, including kangaroos, koala bears or wombats live in Commonwealth of australia .

Subsequently nascence the glands of a female mammals produce milk. Some mammals nurse their babies for merely a few weeks. Others, for example elephants, requite milk to their babies for a few years.

The duck-billed platypus and echidnas are the only mammals that lay eggs. After the young hatch they drink milk from their mother, simply like other mammals practise.

Life habits

Many mammals live in families or groups. Wolves and lions aid each other in their search for food and protect each other from attackers.
Leopards, cats, tigers and other mammals prefer living alone . They practice non share their living infinite and food that they have, however males and females get together to mate.
Mammals can mark the areas that they live in. They defend these areas by fighting off attackers. Some mammals claim territories only during the breeding flavor.

Many mammals migrate during special times of the twelvemonth in order to get food and survive. N American bats travel to the south considering insects become scarce during the cold winter months. Zebras and other wild animals follow the rainy seasons in Africa to notice green grass. Whales drift to warmer southern waters off the declension of Mexico to requite birth to babies because they could not survive in the common cold waters of the Arctic Ocean.

Some mammals hibernate because they cannot find enough food to survive. Their body temperature falls, heartbeat and animate go slower. During this period hibernating mammals do non eat. They live from the fat of their bodies. Bats, squirrels and other rodents hibernate.

Mammals defend themselves from attackers in many means. Hoofed mammals can run chop-chop in order to go food or escape. Squirrels rush into trees to hide. Some animals take special features that protect them from enemies. Skunks spray a bad smelling liquid to go along off attackers. The fur of mammals sometimes changes  with its surroundings. Arctic foxes, for example, are brown in summer and in the winter their coats turn white.

Squirrel eating a peanut by DAVID ILIFF

History of mammals

The first mammals probably evolved from reptiles about 200 million years ago during the Mesozoic menstruum. They were rather small in a time when dinosaurs ruled the lands. When the dinosaurs died out about 65 million years ago mammals became the dominant land animals. Many mammals became extinct during the Water ice Age , which ended thousands of years ago.

Today, some species are in constant danger of condign extinct because they are hunted by humans. Hunters and poachers earn money past selling fur, tusks and other parts of mammals. Larger wild animals are frequently brought to zoos where they are protected.

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• Prehistoric Mammals Much Bigger Than They Are Today
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Words

• ages = a very long time
• anteater = an animal that has a very long nose and eats insects
• attach = connect
• attack = violence confronting someone
• balance = to keep steady
• bamboo = tall tropical found with hollow stems
• beat = hit, move
• blend in = to have the same colour as
• brain = organ inside your caput that controls the way you feel, think and move
• branch = function of a tree that grows out from the main stem; it has leaves and fruits on it
• breathing = take in air
• convenance season = time during which animals mate in order to have babies
• certain = special
• chew = to seize with teeth food many times earlier you swallow information technology
• claim = show that something belongs to them
• hook = abrupt curved boom on an animate being
• coast = where land meets the sea
• communicate = become into contact with
• abiding = always
• deer = a big wild animal that can run very fast, eats grass and has horns
• defend = guard, protect
• find = find
• develop = abound
• digest = to change food that y'all have eaten into substances that the body can use
• digestive system = the manner food passes through your torso
• domesticate = to railroad train an animal so that it can work for other people or be a pet
• dominant = number 1
• duck-billed = with a rima oris like a duck
• echidna = anteater
• enable = allow, allow
• enemy = person or animal that hates you lot and wants to fight against you lot
• equally = the same
• escape = to get away from a dangerous situation
• evolve = grow, develop
• exotic =  unusual, different
• extinct = die out
• feature = quality, characteristic
• feed = to requite food to
• female =about a woman
• fertilize = to brand a new constitute or fauna abound
• fertilizer = substance that is put on the soil to make plants grow
• flesh = meat
• flipper = flat function of the torso of some sea animals that is used for swimming
• four chambered = with four separate parts
• fur = thick soft hair that covers the bodies of animals
• future = coming
• gland = organ of the body that produces textile that the body needs, similar hormones, sweat or milk
• goods = products
• gopher = due north and Central American creature like  a large rat that lives in holes in the ground
• grasp = go hold of
• guinea sus scrofa = minor hirsuite animal with short ears and no tail; information technology is frequently kept as a pet
• harmful = dangerous
• hatch = the egg breaks and a young animal comes out
• hibernate = to sleep the whole wintertime
• highly-developed = very good
• hippopotamus = big grayness African animal with a big caput and mouth that lives most the water
• hoof = difficult pes of a cow, equus caballus or a camel
• hop = spring
• hormone = chemical substance that the body produces and influences how you grow and develop
• however = just
• human being = a person
• Ice Age = one of the long periods of time thousands of years ago when ice covered the northern countries
• identify = recognise, discover
• illegal = against the police
• including = also
• instead of = in something's identify
• intestine = long tube through which food passes after it leaves your stomach
• ivory = the hard smooth yellow material from the tusks of elephants
• limb = leg or arm
• liquid = something watery
• mark = show the position of something
• marsupial = animal that carries its baby in pocket of peel
• mate = to have sex in order to produce babies
• Mesozoic = the geologic center ages
• migrate = to travel regularly to some other place in the world
• mole = small night furry beast that is near blind ; moles commonly alive nether the ground
• navigate = travel effectually, steer
• nurse = feed with milk
• oxygen = gas that has no colour or odor and which nosotros need to breathe
• platypus = a small hirsuite animal that has a mouth and anxiety like a duck
• turn =  turn over the earth so that seeds can be planted
• poacher = someone who catches or shoots animals illegally
• pop = well-known
• pouch = pocket of skin
• prefer = like
• pregnancy = when a female has a baby growing inside her
• prepare = to get ready
• casualty = victim, target, the animal they want to eat
• primate = a member of a group of animals that include humans and monkey
• protect = defend confronting enemies
• raise = bring up
• rather = relatively, quite
• reindeer= a big deer with long horns that lives in northern, colder areas
• rely = depend on, demand
• reproduce = to have babies
• reptile = animal similar a snake or cadger whose body temperature changes according to the temperature around it
• rodent = small creature that has long sharp front teeth , like a rat
• dominion = to have the power over others
• rush = hurry
• deficient = rare, nor enough
• seal = a big sea creature that eats fish and lives around the coast
• search = wait for
• sense = i of the v natural powers : seeing, hearing, feeling, tasting, smelling
• sense of hearing = the way an animal can hear
• share = use with some other brute
• sight = vision, ability to run across
• skull = bones of a person'south or animal'south caput
• skunk = a black and white North American animal that produces a potent bad smell when it is attacked
• snout = long olfactory organ of an creature
• soil = the top layer of the earth, on which plants grow
• species = group of plants or animals that are alike and can produce young ones
• sperm = a prison cell of a man that can produce new life
• spine = the row of basic downward the center of your back
• spray = a stream of very small drops
• spread  = to motility from 1 identify to another
• squirrel  = small animal with hirsuite skin that climbs trees and eats nuts
• stretch = to go from i place to another
• surroundings = the world around us
• survive = continue to live
• sweat = drops of salty liquid come through your peel because it is hot or you are doing a lot of practise
• tail = function that sticks out of the back of an creature
• tear = rip
• territory = land
• throat = the passage from your mouth to the tubes that go to your breadbasket
• tiny = very small
• tissue = the material that forms cells
• trot = to movement quickly with each forepart leg moving at the same fourth dimension equally 1 of the back legs
• tusk = long curved tooth of an elephant
• upside downward = with the height at the lesser and the bottom at the top
• warm-blooded = animals that take the same trunk temperature all the time
• waste = the material that animals leave subsequently they digest food
• weak = not strong
• weed = wild plant that prevents crops or garden flowers from growing in the right way
• well-developed = something that works very well
• whale = very large mammal that swims in the body of water
• whisker = long hair that grows near the oral cavity of a cat or mouse
• wombat =an Australian brute  like a small conduct whose babies live in a pocket of skin

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Source: https://www.english-online.at/biology/mammals/world-of-mammals.htm

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