Virtual Dissection Project

By: Anna Joslin

Objectives

Arthropod Lab

This lab reflected on the difference between crayfish and grasshoppers.

The Grasshopper's scientific name is caelifera. Its habitat is generally fields and grass, which they eat.Their niche is to fertilize plants with their droppings, and they are eaten by birds, lizards, spiders, and rodents.

The Crayfish 's scientific name is Astacoidea. Its habitat is in shallow or deep parts of bodies of water. It feeds on Living, dead, animals or plants. Their niche is to be an omnivoric scavenger. They are eaten by some land animals, like racoons, and bass.

The Integumentary system

Its main functions are protection against the outside and to hold all the organs and water inside the body. The Integumentary system in both the grasshopper and crayfish are very similar. They both have jointed legs, body regions, segmented abdomen, eyes, antennae, and an exoskeleton.

Earthworm Dissection

In this lab we dissected an earthworm to see the organs inside.

The earthworm's scientific name is Lumbricus terrestris. They live in the soil burrowing through it. Earthworms eat the dirt they crawl through, taking out minerals and excreting the leftover dirt. Many rodents that dig in the dirt are what eat the earthworm, such as turtles, birds, and moles. Their niche is to create holes in the earth for the roots and plants to grow.

Digestive system

The digestive system consists of the pharynx, the esophagus, crop, gizzard, and intestine.gizzard. The soil first enters throught the mouth, where it is swallowed by the pharynx. Then the soil passes trough the esophagus which breakes it up. After the esophagus, the soil goes into the crop for storage and later into the gizzard to be grinded completely. The last step, the soil goes into the intestines where it is degested and absorbed by the body.

Perch Dissection

In this lab, we dissected a perch where we cut it open to view the inside.

The perch's scientific name is perca flavescens, and its habitat is in freshwater lakes or rivers. Depending on their size, perch eat anywhere from plankton to sea worms or leeches. Their niche is to prey on plankton, shellfish, small fish and small larve. their predators include bass, catfish, and some birds

Endocrine system

The endocrine system's main function is making hormones. Some of the organs in the endocrine system are the gonads, pituitary, thyroid, pineal, urophysis, pancreatic islets, cromaffin tissue, and intestinal mucosa. They all work together to keep the fish alive and healthy.