1 / 8

38-2 Arthropoda

38-2 Arthropoda. Phylum: Arthopoda Subphylum: crustacea lobster, crayfish, shrimp, sow bugs, pill bugs, daphnia and barnacles. Daphnia. Barnacles. I. Digestion. Food  esophagus  stomach  intestines and digestive gland  anus 

guerrerok
Télécharger la présentation

38-2 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. 38-2 Arthropoda • Phylum: Arthopoda • Subphylum: crustacea • lobster, crayfish, shrimp, sow bugs, pill bugs, daphnia and barnacles

  2. Daphnia

  3. Barnacles

  4. I. Digestion • Food  esophagus  stomach  intestines and digestive gland  anus  • Stomach: contains teeth made of chitin and calcium carbonate which grind food into a fine paste • Intestines: final digestion and absorption  • Digestive gland: secretes enzymes to aid in digestion

  5. II. Respiration   Gills • Located at base of each walking leg and extends up into a chamber under the carapace • As crayfish walks, this helps circulate water across gills

  6. III.CirculationOpen circulatory system • Dorsal heart pumps hemolymph into regions of the body and then into hemocoels where tissues are nourished. The hemolymph then passes through gills where it exchanges carbon dioxide for oxygen and then returns to heart.

  7. IV. Excretion Green Glands • Eliminates excess water through a pore at the base of the antennae

  8. V.Neural control: Nervous system • Brain consists of pair of ganglia above esophagus • Receives impulses from eyes, antennules and antennae • Ventral nerve cord carries impulses down body • Sensory hairs on body also pick up impulses • Eyes are compound (contains many lenses) and set on movable stalks • At base of each antennule is an organ which is used for orientation

More Related