Integumentary System

The integumentary systems of the four organisms, the earthworm, crayfish, grass frog, and the white rat are all different, their integumentary system need to help them adapt to the different enviornment. This system is something that covers the body, such as fur, skin or shell. Those covering can help prevent damage such as the loss of water, can also have a lot of different functions. The Integumentary System is the largest body organs and protects the organism for its unknown surroundings
   

Earthworm

The earthworm's skin has two layer. The skin can allow oxygen to get to the blood and carbon dioxide exchange. Its body also has a lot of segments, with a head section and a anus section. The worm is also very rubbery but very moist.The worm's skin is also sensitive to light and touch so it knows where to go. There is also very ting things on the worm that are called setae, the setae are there to help the worm move. The band aid looking thing is called the clitellum and is used for reproduction. the worm are very defensiveness because it does not have legs of hands like other organisms, instead it is really slimmy and squishy.

Crayfish 

The crayfish has an orange-brown shell that is great for protection when predators are near and also give the crayfish its' structure. The many segments on the crayfish allow them to swim more flexibly. The cray fish also has a pair of claws to help them when there are other organisms trying to eat them. They also have other small legs called swimmerets that help them swim. They have two antennas on the crayfish, the antennas are sensory structure, they help the crayfish to touch and feel things. 

Grass Frog

The grass frog has a brownish-greenish skin that is held loosely on the frog and is very slimmy like the worm. Their skin allows the frog to get oxygen and water. The colors are for the frog to camouflage with their environment or it can be used to warn predators of toxin poisons. The frog also has front legs and hind legs with webbed feet to help jump and swim. The head had two bulging eyes to see outside the water and has a 3rd eyelid to protect the eyes.

White Rat 

The white rat has three layers of skin, the epidermis, dermis, and subcutaneous tissue. They have white fur nails, and a tail. Due to their poor eye sight, the rats have whiskers to help them tell what is around them. The rat is warm blooded, its tail is there to help regulate the temperature. The rat's fur can sometimes attract fleas, lice, or mites. their ear, nose, and mouth are also very good. The rat's two front teeth are very sharp so it is easier for them for eating different kinds of food.