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Human beings are vertebrates and placental mammals.
One of the features that most distinguishes humans from other mammals is
language, an ability that allows us to transmit and accumulate knowledge and
experiences.
Human babies are born completely developed but, in contrast to other mammals,
they are totally defenceless. They need to be looked after by adults for many years.

As a species we have some particular caracteristics:
• We have little hair on our bodies. It is only plentiful in certain areas, such as our
heads.
• Females develop mammary glands, which are located in the breasts.
• Our skin has many sweat glands. Sweating helps us reduce our body temperature.
• We walk on our two back limbs, our legs; we are bipeds. Our front limbs are,
therefore, free to carry out other functions.
• The size of the human brain is very large in comparison to the size of the human
body.
• We comunicate with individuals of our own species and we are able to learn.

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-They have different kinds of glands, such as the ones
that secrete sweat and oily substances. The most characteristic are the mammary glands that produce milk to feed their young.

-Mammals are tetrapods. Terrestrial mammals have legs; marine mammals, fins; and flying mammals, wings as front limbs.

-Their body is covered by hair or fur a good thermal insulator that also protectes them from humidity

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They are vertebrates and include a great diversity of species.The majority are terrestrial but there are also marine mammals such as whales and dolphins and even flying mammals such as bats Although there are so many different kind of mammals certain characteristics can be used to define most mammals:

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-They are endothermic
-They breathe through their lungs
-Mammals have very varied eating habits. They can be herbivores, carnivores or omnivores

-They are viviparous
-They have a developed nervous system

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They are endothermic, they are able to produce and maintain their own heat to keep a constant body temperature regardless of the temperatures in the environment

-They breath through their lungs

-Their eating habits are varied and releated to the size and shape of their beaks

-They lay amniotic eggs with hard shells so they are oviparous

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Birds are vertebrates with wings. They live in all parts of the Earth and many are able to fly long distances. This allows them to find the best place to live in each season, so it's no wonder that we see birds almost everywhere. The main features of birds are related to their ability to fly:

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Reptiles are mostly terrestrial vertebrates, although there are a few species of marine reptiles for example a turtle and a crocodile they inhabit mainly temperate and tropical zones but some even live in desert areas.

-Their scaly skin is tough and dry, they have scales made of keratin that protect them from dehydration and injury.

-They are tetrapods wich means their legs are adapted for walking climbing or swimming. Some of them like snakes do not have limbs and use theit vody to crawl lr slither forwards.

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-They are ectothermic or cold-blooded animals

-They breath through their lungs

-Many reptiles are carnivores and hunt their prey. Some reptiles have glands with poison that they use to paralyse their prey before they swallow it

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Animals that are amphibians follow this body features:

-They are tetrapods=(4 feet) their limbs support them on the ground and allow them to move around on land

-They have thin, moist skin. This sticky mucus is produced by glands, some of them have poison

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-They are cold-blooded their bodies temperatures change according to the temperature of their environment

-The majority of amphibians are carnivores; tadpoles, however, they are hervibores.

-They breath through their skin wich must remain moist for the oxygen to be absorbed into their bodies

-They are oviparous they lay eggs in water. The eggs hatch into larvae called tadpoles.

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Metamorphosis is the developmental process some animals go through from birth to adulthood as they grow.
In the case of frogs, tadpoles are aquatic animals and herbivores. They undergo significant changes as they develop until they become adult amphibians. As terrestrial animals, they are carnivores.

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They have strong muscles wich propel their bodies as they swim
Their limbs are fins that allow them to swim, chane direction and maintain stability in the water

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Learning About Vertebrates and Invertebrates

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Animals with a backbone and an endoskeleton

Characteristics: They all have the same body plan, their main characteristics are
-They have an internal skeleton, or endoskeleton (includes backbone)

-They have bilateral symmetry

-Body is divided into 3 segments: head, trunk and tail

-Their nervous system is made up of the brain found inside the cranium, the spinal cord located in the backbone and nerves

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They consume food that comes from other animals. Carnivores that hunt for their food are called predators and those who feed in other dead bodies are called scavangers

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They feed on plants or seaweed. Many herbivores eat grass but others consume seeds, fruits, flower nectar or even wood such as termites

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It's body can be divided into two equal parts by one line down the centre. Many animals have this type of symmetry

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It's body can be divided into symmetrical parts in a minimum of two directions

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It's body can not be divided into symmetrical. There are no lines of symmetry

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Animals are living things beacause: they are multicellular, they have the ability to detect changes in their environment and the ability to move freerly (interactions)

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Their body temperature changes according to the temperature of the environment they are ectothermic= (outside heat).

Fish take oxygen dissolved in the water into their bodies through the gills.

The majority of fish are carnivores and they reproduce by laying eggs so they are oviparous

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Nutrition- Animals are heterotrophs (obtain food from other living things) (Herbivores, Carnivores, Omnivores)

Interaction: They have sense organs wich allow them to detect changes in the environment

Reproduction: This is a biological process by wich living things produce new offspring (Sexual, Asexual)

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Animals without a backbone