1 / 12

The greatest of the phylums !!!

Stefani M. Simeon N. Anand P. Pat P. Eric T. Arthropoda. The greatest of the phylums !!!. Germ Layers. Since arthropods are a higher form of life than the flatworms, they develop with three germ layers. The germ layers are formed while they are developing in the embryonic state.

tambre
Download Presentation

The greatest of the phylums !!!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Stefani M. Simeon N. Anand P. Pat P. Eric T. Arthropoda The greatest of the phylums!!!

  2. Germ Layers Since arthropods are a higher form of life than the flatworms, they develop with three germ layers. The germ layers are formed while they are developing in the embryonic state.

  3. Symmetry Arthropods have bilateral symmetry. So arthropods are usually symmetrical when divided down the center. Some however, do not have bilateral symmetry. For example, the barnacle is considered to be an arthropod and yet it does not have bilateral symmetry.

  4. Coelom Arthropods are considered to be coelomates because they are triploblastic. Coelem is the cavity sack inside the plant that provides structural support as well as protection for the internal organs and pathways.

  5. Digestive Tract • The arthropods are protostome animals in their embryonic development. They have tube like digestive tracts that start from the mouth and end in the anus. The blastopore originates the mouth.

  6. Cephalization • Arthropods have cephalization. This is present when one looks at the heads of arthropods that justify this fact.

  7. Segmentation • Arthropods are usually segmented A good example would be insects. Their bodies are segmented into three parts. Head, thorax and abdomen. The lobster also has a similar design

  8. Skeleton and Appendages • Arthropods have an exoskeleton • They usually have 3 plus pairs of joint appendages.

  9. Circulatory System • In most arthropods circulation is provided by a heart that runs the length of the back/thorax. This means that they have an open circulatory system

  10. Respiratory System • Three different methods: • Aquatic species have gills • Land arthropods have internal surfaces for gas exchange • Insects have tracheal systems, branched air ducts leading into the interior.

  11. Reproduction • Most rely on sexual reproduction. • Aquatic arthropods may breed by external fertilization. • May lay eggs

  12. Habitat Aquatic habitats • Ponds, pools, puddles Ground habitats Plant habitats Woodland habitats fields

More Related