Animal kingdom

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They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems.

Amphibians are small vertebrates that need water, or a moist environment, to survive. All can breathe and absorb water through their very thin skin. Amphibians also have special skin glands that produce useful proteins.

Amphibians swallow their prey whole, so they do not need teeth for chewing. They are called vomerine because they are found in the facial bone called the vomer.

Animals dominate human conceptions of life on Earth because of their size, diversity, abundance, and mobility. The presence of muscles and mobility is one of the primary characteristics of the animal kingdom.

The overivew of the books , is the  characteristic unique to the animal kingdom is the presence of differentiated tissues, such as nerve, muscle, and connective tissues, which are specialized to perform specific functions.

Symmtery is important because its the main feature of nature that restricts the permissible dynamic laws. Its also how aniamls communicate. Example bumble bees, which have poor vision, but they can recognize symmetrical shapes.

To reproduce, animals need a male and female. Together they can create offspring, or babies.

Birds are vertebrate animals that have feathers, wings, and beaks. Like all vertebrates, they have bony skeleton. Most birds are able to fly, but some (like ostriches and penguins) cannot fly even though they still have wings.

Birds have no teeth, so they can't chew their food. Instead, they just drop it down their throat. Some birds, such as pigeons and game birds, have a pouch in their throat called the crop. Here they store food when feeding in a hurry, ready to digest it later.

Arthropods are invertebrates with segmented bodies and jointed limbs. The exoskeleton or cuticles consists of chitin, a polymer of glucosamine.

They make up about 75% of all animals on Earth and have a major role in maintaining ecosystems as pollinators, recyclers of nutrients, scavengers and food for other animals.

Most arthropods are scavengers, eating just about anything and everything that settles to the ocean floor. Skeleton shrimp feed detritus, algae or animals. Crabs feed on mollusks they crack with their powerful claws.

Mammals are a group of vertebrates. The thing thats makes them different is that the females produce milk for feeding their young, a neocortex, fur or hair, and three middle ear bones

The three diets of animals include  that eat only plants, those that eat only meat, and animals that eat both plants and meat. Animals that eat plants exclusively are herbivores, and animals that eat only meat are carnivores, Omnivores eat both meat and plants. 

Fish are aquatic vertebrate animals that have gills but lack limbs with digits, like fingers or toes. Recall that vertebrates are animals with internal backbones. Most fish are streamlined in their general body form.

Their diets range from microscopic plants to other large fish and aquatic mammals and birds. To obtain these various foods, they have developed foraging and hunting techniques

A animal is a living organism that feeds on organic matter, typically having specialized sense organs and nervous syste.

Animals get their food by eating plants and algae and get the energy they need for the work. But some animals can eat other animals to get energy. For example, Bears can eat small animals.

Understanding and classifying the large variety of living species help us better understand how to conserve the diversity of life on earth.&nbsp;

Next page will teach us about there habits!

Generally, their bodies consist of a rounded bell with a mouth on the underside.

Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda

invertebrates feed by ingesting their prey directly, by filter feeding, or by actively capturing prey. Some groups of invertebrates live on land. Common examples include the earthworms, insects, and spiders.