1 / 11

Phylum Arthropoda

Phylum Arthropoda. The largest group of animals within this kingdom. Arthropods are the most biologically successful group 1 million known species of arthropods They are suited for life in most conditions. Division of Arthropoda.

robertok
Download Presentation

Phylum Arthropoda

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. Phylum Arthropoda The largest group of animals within this kingdom

  2. Arthropods are the most biologically successful group • 1 million known species of arthropods • They are suited for life in most conditions

  3. Division of Arthropoda • The phylum arthropoda can be divided into five groups, or subphylum: • Crustaceans • Centipedes • Millipedes • Arachnids • Insects

  4. They All Share Certain Characteristics . . . • Bilateral Symmetry • Coelomates • Segmented body • Organ / system level of organization • Complete digestive tract

  5. What Separates Them From Other Animals?? • Jointed appendages • Exoskeleton • Chitin and protein • Well-developed nervous system • Distinct brain, nerve cords • Open circulatory system • Tubular heart and arteries

  6. Jointed appendages • Legs are made up of several pieces • These pieces are connected at hinged joints • Different arrangements of these joints along with opposing sets of muscles allow different functions Arthropoda = “jointed feet”

  7. The Exoskeleton • Composed of protein and chitin, a carbohydrate • Provides protection to the soft body parts • Prevents water loss • Adaptation to life on land • Exoskeletons do not grow along with the organism • Molting – shedding of the exoskeleton, replacement with larger one

  8. Arthropods Are Segmented . . . • Segments are modified and fused • Form specific body regions • HEAD • Six segments • Contains specialized mouth • Antennae • Compound eyes • THORAX • The middle region • ABDOMEN • The posterior region

  9. Advancements in the Nervous System • Cephalization is extensive • Disinct anterior region • Most sensory organs located in anterior region • Well-developed sensory organs • Eyes • Receptors for smell • Antennae to respond to touch

  10. All Arthropods Have an Open Circulatory System • Tubular heart located dorsally • Above digestive tract • Transport medium called hemolymph • Arteries carry hemolymph away from heart • Flow into spaces surrounding tissues and organs • Hemolymph brought back to the heart through pores equipped with valves

  11. Arthropoda : Reviewing Their Success • Their success has been brought about by several evolutionary events • Exoskeleton acting as a cuticle • Segmentation and appendages • Extensive nervous system and behaviors

More Related