We are five future teacher who want to teach in a different way, who want their students to retain the information and have fun doing it. We are five teachers of the future who will never forget that Technologies are fundamental in all areas and, above all, in education. In this blog you can learn a lot about living things from the five animal kingdoms. You can expand information that you already know and, in addition, use the resources we provide to make learning much easier. We live in a world full of each and every one of them, let's take care of them because otherwise they will disappear and if they do, we will do it with them.
Animal Kingdom
Little introduction to Animal Kingdom.
The animal kingdom is the largest and most diverse of all the kingdoms of living beings, in fact if we collected all the species of the other four kingdoms and added them, the total number would be much less than the total number of animals in the world. To date, more than seven million animal species have been identified.
In addition, unlike other kingdoms, animals have a unique level of organization referred to their cells. Animals have millions of millions of cells. These can be grouped and form tissues (there will be different depending on the function, such as muscle tissue, nervous ...). When many tissues come together to work together it is called an organ and when an organ works with others in the same task, it is known as an organ system.
Despite its diversity, all beings belonging to this kingdom share five main characteristics: they depend on other animals and plants for their food (creating from it the energy to live), they are multicellular (they are formed by many cells), they are mobile (some more than others), they reproduce sexually and have sense organs that allow them to react quickly to the stimuli of their environment.
Where do animals live?
WILD ANIMALS
Wild animals are animals which can't live with humans, they live in freedom in the nature. There are a lot of places where they can live for example:
On the beach or in the sea.
Crab lives on the beach and sea fishes live in the sea
In the forest or in the river
The wild boar lives in the forest and the otter lives in the river.
In the jungle
The parrot and the black panther live in the jungle.
In a dessert.
Scorpions and rattlesnakes live in the dessert.
In the savannah
In the savannah live the antilope and the king of the jungle, the lion.
DOMESTIC ANIMALS
The word, Domestic, means that a species of animal has lived alongside humans for so many years that they are no longer considered wild. Humans keep many kinds of animals as pets (birds, fish, rabbits) but even though they have been with humans for hundreds of years, they are still not domestic. It takes thousands of years to take the wild out a species of animal. Dogs and cats are the most common domestic animal. They are much different than their wild cousins but they still have many things in common.
They can live at home
Cats and dogs live at home, they are called pets.
On the farm
The cow and the rooster live on the farm.
What do animals need to live?
The animals need few things to live:
Water. It's very important to live and to have more functions.
Food. For the growth and maintenance of the body, as the energy necessary for its operation.
Oxygen. To live in general.
Some animals that are exposed to extreme situations or simply obtain these elements in another way. Fish, for example, get oxygen from water and camels, which live in the desert, do not need much water thanks to their humps, which function as warehouses.
In addition, we must consider, that not all animals do not eat the same.According to their diet, animals can be classified as carnivores, omnivores and herbivores.
First, we are goint to talk about carnivores. Canivoros are those animals that feed only on meat, for example, the lion, the tiger, the wolf, eagles, etc.
Second, the herbivores. This type of animal feeds only on fruits, vegetables and seeds. For example, rabbits, koala, giraffe, zebra, cow, etc.
Finally, the omnivores, this type of animal feeds on meat and vegetables, as is the case with the bear, pig or hare.
Clasification
How are animals classified according to their diet?
The animals are consumers and depending on what they eat they are classified as: herbivores, carnivores or omnivores.
Omnivore : Pigs, Hedgehogs, Chickens and Humans
Omnivores get energy and nutrients from eating a diet containing plants, animals, algae and fungi. Due to the large variety of food options, they will eat what they can hunt and scavenge in their environment to make the most of what is available. If it looks edible, they’ll give it a try!
Carnivore : Lions (Felines), Toads, Snakes and Owls (Birds of Prey).
Carnivores eat meat (and other animal tissue) to get the calories and energy to survive. Meat is a high energy food source. Carnivores find their food through predation or scavenging, and are often adapted with big claws, sharp teeth/beak and quick speed whether on land, in the sea or in the sky.
Herbivore : Horses, Rabbits, Zebra
Herbivores only eat plants to get energy and nutrients. Most animals will eat the leaves and fruits of plants as these tend to be the more nutritious. Plant vegetation, however, is very hard to break down into energy so most herbivores have a specialised digestive system.
A cow will chew grass and swallow, nothing unusual so far. The food then passes through not one but two stomachs to be digested, and then is regurgitated (brought back up) to be re-chewed. This part-digested grass is called cud It is then swallowed into third and fourth stomachs where the nutrients are absorbed into the blood.
Herbivores graze for long periods throughout a day to gain as much energy as possible. So when you see a herd of cows looking like they’re just standing around chewing the cud they are- but their four stomachs are working hard to get the most out of every mouthful.
How are animals classified according to their locomotor system?
Invertebrates
Of the million or more animal species in the world, more than 98% are invertebrates. Invertebrates don't have an internal skeleton made of bone. Many invertebrates have a fluid-filled, hydrostatic skeleton, like the jelly fish or worm. Others have a hard outer shell, like insects and crustaceans. There are many types of invertebrates. The most common invertebrates include the protozoa, annelids, echinoderms, mollusks and arthropods. Arthropods include insects, crustaceans and arachnids.
Protozoa
Protozoa are simple, single-celled animals. They are the smallest of all animals. Most protozoa are microscopic in size, and can only be seen under a microscope. However, they do breathe, move and reproduce like multicelled animals.
Worms and Leeches
There are about 9,000 species of Annelids known today, including worms and leeches. They can be found almost anywhere in the world. Annelids have existed on Earth for over 120 million years.
Annelids have bodies that are divided into segments. They have very well-developed internal organs. One common characteristic of annelids is that they don't have any limbs. Some annelids may have long bristles. Others have shorter bristles and seem smooth, like the earthworm shown here.
Mollusks
Mollusks were among the first inhabitants of the Earth. Fossils of mollusks have been found in rocks and date back over 500 million years. Mollusk fossils are usually well preserved because of their hard shell.
Most mollusks have a soft, skin-like organ covered with a hard outside shell. Some mollusks live on land, such as the snail and slug. Other mollusks live in water, such as the oyster, mussel, clam, squid and octopus.
Echinoderms: Starfish, Sea Urchin and Family
Echinoderms are marine animals that live in the ocean. Common echinoderms include the sea star, sea urchin, sand dollar and sea cucumber. Most echinoderms have arms or spines that radiate from the center of their body. The central body contains their organs, and their mouth for feeding.
Sea stars, commonly known as the starfish, have 5 or more arms attached to their body.
Crustaceans
Crustaceans are a type of Arthropod. The name may not sound familiar, but you probably know them. You may even have eaten one.Crustaceans live mostly in the ocean or other waters. Most commonly known crustaceans are the crab, lobster and barnacle.
Crustaceans have a hard, external shell which protects their body. Crustaceans have a head and abdomen. The head has antennae which are part of their sensory system. The abdomen includes the heart, digestive system and reproductive system.
Arachnids: Spiders, Ticks and Scorpions
Arachnids are a type of arthropod. You know many of them as spiders. Common arachnids are spiders, scorpions, ticks and mites.
Like other arthropods, the arachnids have a hard exoskeleton and jointed appendages for walking. Most arachnids have 4 pairs of legs. In some, the first pair of legs may be used for holding their prey and feeding. Unlike other arthropods, arachnids do not have antennae.
Insects
Insects are the largest group of arthropods. There are over 800,000 different types of insects. Insects are very adaptable, living almost everywhere in the world. Common insects include the fly, beetle, butterfly, moth, dragonfly, bee, wasp and praying mantis.
Insects have an exoskeleton that covers their entire body. An insect's body consists of 3 parts: the head, thorax and abdomen.
Vertebrates
Animals with an internal skeleton made of bone are called vertebrates. Vertebrates include fish, amphibians, reptiles, birds, mammals, primates, rodents and marsupials.
Although vertebrates represent only a very small percentage of all animals, their size and mobility often allow them to dominate their environment.
For example, we can see:
Fish
Lion
Reproduction
Animals show different methods of production of young ones. Oviparous and viviparous are such two methods. The main difference between oviparous and viviparous animals is that oviparous animals do not undergo any embryonic development inside the mother whereas viviparous animals develop into a young animal inside the mother. This means oviparous animals lay eggs. These eggs develop and hatch into young individuals. In contrast, viviparous animals are born as live young individuals. Therefore, they do not lay eggs. Birds, reptiles, amphibians, most fish, insects, mollusks, arachnids, and monotremes are oviparous animals. Most mammals are viviparous animals.
What are Oviparous Animals?
Oviparous animals refer to the animals that produce eggs; the maturation and hatching of young ones occur outside the female body. The fertilization of the egg may occur either internally or externally. Birds, reptiles, amphibians, most fish, insects, mollusks, arachnids, and monotremes are oviparous animals. Many birds, amphibians, reptiles and fish produce nests in order to protect their eggs. However, some sharks and snakes are oviparous animals whose eggs hatch inside the female body and live, young ones are expelled.
Oviparity can be considered as an evolutionary strategy of reproduction since a large number of eggs can be produced at a time. Each egg may serve as a gamete. Once fertilized, eggs develop into the embryo. Most of the eggs are small and fragile. But, some oviparous animals lay large eggs. Since small eggs are laid in large numbers, they can produce a large number of offspring as well. Moreover, a large egg may have a higher chance to survive. However, oviparous animals have to protect their eggs from predators. They have to sit on their eggs in order to keep them warm.
What are Viviparous Animals?
Viviparous animals refer to the animals that give birth to developed live young individuals. These animals possess special organs which supply nutrients for the development of the embryo. This condition is referred to as matrotrophy. This means the embryo of the viviparous animals receives nutrients from the mother, rather than from the yolk. Some fish, amphibians, reptiles, and mammals show viviparity. But, birds do not show viviparity. Mammals also consist of mammary glands, which produce milk to feed the young ones. Humans are one of the examples of viviparous mammals.
Typically, viviparous animals take a longer time to care for their young ones. Some young animals such as dolphins stay with their mother for years. Due to this caring of mothers, viviparous animals show a greater survival.
Similarities
Between Oviparous and Viviparous Animals
Both oviparous and viviparous are two methods of the production of young ones
Internal fertilization can occur in both oviparous and viviparous animals.
Difference
Between Oviparous and Viviparous Animals
Definition
Oviparous Animals: Oviparous animals refer to the animals that produce eggs that mature and hatch after being expelled from the body.
Viviparous Animals: Viviparous animals refer to the animals that give birth to developed live young individuals.
Correspondence
Oviparous Animals: Oviparous animals lay either fertilized or unfertilized eggs.
Viviparous Animals: Viviparous animals give birth to young individuals.
Internal/External Fertilization
Oviparous Animals: Oviparous animals may undergo internal or external fertilization.
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