Comparative Invertebrate Anatomy
Sponge
Sponges are good habitats because for other organisms because they help filter waste out of the water. Sponges and crustaceans share a beneficiary relationship. Sponges help disguise the mollusks and also can emit a toxin to ward off predators. In turn, the crustaceans take the sponges into clean water where it is easier to survive.
Sponges are good habitats because for other organisms because they help filter waste out of the water. Sponges and crustaceans share a beneficiary relationship. Sponges help disguise the mollusks and also can emit a toxin to ward off predators. In turn, the crustaceans take the sponges into clean water where it is easier to survive.
Jellyfish
Porifera animals have no vital organs. Cnidaria have evolved to include most vital organs except do circulatory or respiratory systems. Instead, they use diffusion for respiration, circulation, and excretion. Cnidaria reproduction is achieved by external fertilization and sexual and asexual reproduction. They feed by paralyzing their prey and eating them in their gastrovascular cavity extracellularly. They have also evolved to a bilateral symmetry body plan.
Porifera animals have no vital organs. Cnidaria have evolved to include most vital organs except do circulatory or respiratory systems. Instead, they use diffusion for respiration, circulation, and excretion. Cnidaria reproduction is achieved by external fertilization and sexual and asexual reproduction. They feed by paralyzing their prey and eating them in their gastrovascular cavity extracellularly. They have also evolved to a bilateral symmetry body plan.
Squid:
Mollusks have a body wall protecting a body cavity. The vital organs are located inside of the body cavity. This means that they are coelomate. Mollusks are also bilaterally symmetrical. They also possess a one-way gut - meaning food is taken in through one exit and waste exits a separate exit. Also, mollusks are non-segmented.
Mollusks have a body wall protecting a body cavity. The vital organs are located inside of the body cavity. This means that they are coelomate. Mollusks are also bilaterally symmetrical. They also possess a one-way gut - meaning food is taken in through one exit and waste exits a separate exit. Also, mollusks are non-segmented.
Worm
In earthworms, there are organs present. They have seven types of systems; they have the respiratory, muscular, circulatory, excretory, digestive, nervous, and reproductive system. The earthworm is segmented, and all of its organs lay in a fluid-filled cavity called the coelom. Compared to Cnidaria and Porifera, the Annelida phylum has advanced by becoming cephalized (when important/specialized organs become concentrated in one area of an organism).
In earthworms, there are organs present. They have seven types of systems; they have the respiratory, muscular, circulatory, excretory, digestive, nervous, and reproductive system. The earthworm is segmented, and all of its organs lay in a fluid-filled cavity called the coelom. Compared to Cnidaria and Porifera, the Annelida phylum has advanced by becoming cephalized (when important/specialized organs become concentrated in one area of an organism).
Grasshopper
Arthropods have open circulatory systems, which means that blood is confined into vessels in only part of the entire system. Their body is segmented and consists of a head, thorax, and a body. What stands out about the grasshopper’s anatomy is that they have jointed appendages on both legs. This helps for walking and jumping. Arthropods have also evolved to have an exoskeleton. The segmentation seen in previous invertebrates has fused together in arthropods to form three distinct segments; the head, the thorax, and the abdomen. Arthropods are also highly encephalized - intricate mouthparts, compound eyes, and delicate sensory feelers all being in the head portion of an arthropod.
Arthropods have open circulatory systems, which means that blood is confined into vessels in only part of the entire system. Their body is segmented and consists of a head, thorax, and a body. What stands out about the grasshopper’s anatomy is that they have jointed appendages on both legs. This helps for walking and jumping. Arthropods have also evolved to have an exoskeleton. The segmentation seen in previous invertebrates has fused together in arthropods to form three distinct segments; the head, the thorax, and the abdomen. Arthropods are also highly encephalized - intricate mouthparts, compound eyes, and delicate sensory feelers all being in the head portion of an arthropod.
Reflection
In this lab, dissecting each invertebrate was interesting to me because I discovered a lot about their internal and external anatomy, which organs did what specific function, and how each species related to one another. For example, all of them have evolved to contain a bilateral body plan, but only some have open circulatory systems, while others have closed circulatory systems. In addition, some are segmented such as the grasshopper and worm, but some are not, like the jellyfish and squid. Some things I would like to know more about how these organisms evolved to get to the way that they are today, and what the species looked like millions of years ago, along with the different steps in between.