Amphibians

How do these animals digest their food? Do they have a complete digestive system?
When they eat their food, it goes to three different parts of their body so it can be digested. First, the food is in the oral cavity, or the mouth. Then, it goes through the short esophagus. Finally, it reaches the animal's stomach. The acid in their stomachs prevents bacteria from growing. They use an enzyme called pepsin to break down the food. The small intestine absorbs nutrients after the food goes through the stomach.

How do they support their shape? Do they have a skeleton?
All Amphibians have skeletons, but frogs' and toads' skeletons are different from newts' and salamanders' skeletons. Salamanders and newts have long, flexible bodies. They have many vertebrae and a tail. Frogs and toads don't have a tail, and they have very short backbones. Their skeletons also develop long hind legs to help the frogs and toads hop.

How do these animals reproduce? What is their life cycle like?
For Amphibians to reproduce, the male fertilizes the female's eggs after they have left her body. The female usually lays eggs in clumps or strands. Some amphibians take the time to wrap all their eggs in leaves to protect them. After the egg hatches, you have larva. Tadpoles are an example of larva. After the animal is larva, it changes into an adult.

How are these animals unique?
They live all over the world. They can survive in any area as long as there's moisture. Amphibians are very interesting. The Marine Toad can eat small mammals or birds. Also, toads can't see their prey unless the prey is moving. Some amphibians can even breathe through their skin.

What is their class name and their phylum or group?
My group is amphibians. Their name is Amphibia. This is their class name. They are a part of the phylum Chordata. This includes frogs and salamanders.

How do they get oxygen and get rid of carbon dioxide?
Depending on how old amphibians are, their breathing is different. Before amphibians change, they get air through their skin. After they change, they breathe through their skin and with their lungs. This is the primary way of breathing when they are older. They can also use gills, but they usually don't.

What are some examples of this group of animals?
One example of an amphibian is a frog. Some more examples are salamanders and toads. One other one is a newt. Another one is a caecilian or a worm-like creature.

What type of ciculatory system do these animals have?
Amphibians have a big circulatory system. Their bodies have hearts, large and small arteries, veins, and capillaries. Their heart has three chambers. They use their circulatory system to give air and nutrients to their body. This is just like what our system does.

What is their excretory system like? How do they eliminate the wastes we get rid of as urine? Their kidneys are important to have so that they can live. The kidneys are their main way of getting rid of waste. They are located usually on either side of the spinal cord. They use urine to get rid of wastes. The urine exits through the anus.

What is their nervous system like? Do they have sensory structures? They have a simple nervous structure. They do have their own sensing abilities. They depend a lot on their eyes, and their skin is also important. They can feel how hot something is through their skin. Their ability to sense other animals using electricity is also cool.

How are these animals important to humans and the environment? These animals are important to humans and where humans live. The main reason they are important is that they keep the number of insects down. They are also used in medicine, and they are found in myths and art. They are found almost everywhere in our lives.

Where do they live? What are some examples of their habitat and food source? They live in nearly all places of the world. They tend to live in wet areas. Some examples of common homes for amphibians are river banks, swamps, wetlands, and other watery areas. They need to live in wet areas because they take water in through their skin and the sun could dehydrate the amphibians.

Video
Frogs and Salamanders
Adaptable Amphibians
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Other Information
They can breath under water thanks to a cutaneous respiration in their body. They also have an amplexus. This is something they use when males make eggs. Because the amphibians are tied so closely to nature when something happens it effects the amphibians as well. In today's world the amphibians group is getting smaller. One specific class of amphibian is anura this group includes frogs and toads. They move by hopping. Another group is urodela. They include newts and salamanders. They move using muscle contractions or by water.