Arthropods and Echinoderms
1 / 57

Arthropods and Echinoderms - PowerPoint PPT Presentation

  • Uploaded on

Arthropods and Echinoderms. Biology I: Chapter 28. ARTHROPODS. ARTHROPODS. Arthropods. Phylum Arthropoda Insects, crabs, centipedes, spiders Segmented body Tough exoskeleton made of chitin Jointed appendages. Evolution of Arthropods. Fewer body segments

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about ' Arthropods and Echinoderms' - ivy

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Arthropods and Echinoderms

Biology I: Chapter 28


Phylum Arthropoda

Insects, crabs, centipedes, spiders

Segmented body

Tough exoskeleton made of chitin

Jointed appendages

Evolution of Arthropods

Fewer body segments

Highly specialized appendages for feeding, movement and other functions

Form and Function in Arthropods

Complex organ systems; some only found only in this phylum

Tracheal tubes (respiration)

Open circulatory system

Excrete wastes through saclike tubules


Herbivores, carnivores, omnivores, bloodsuckers, filter feeders, detritivores, and parasites

Mouthparts have evolved to allow them to eat anything imaginable

Pincers or fangs to sickle-shaped jaws that can cut through the tissues of captured prey







Respiration: Terrestrial Arthropods

Tracheal tube: one of many branching, air-filled tubes that extend throughout the body

Spiracle: small opening located along the side of the body through which air enters and leaves the body

Book lung: organ that has layers of respiratory tissue stacked like the pages of a book: used to exchange gases

Respire through feather-like gills (i.e. lobster and crabs)

The horseshoe crab respires through organs: book gills


Open circulatory system

Well-developed heart pumps blood through arteries that branch and enter the tissues

Blood leaves the blood vessels and moves through sinuses, or cavities

The blood recollects in a large sinus surrounding the heart

It reenters the heart and is again pumped throughout the body