Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download interaction function
Document related concepts
Transcript
INVERTEBRATES: They don’t have back-bone : they don’t have internal skeleton (p59) - Most primitive animals are in this group - Some groups have body protection such as shells or external skeletons - Some groups have jointed legs Most Primitive animals Poriferans Cnidarians Body protected with an exoskeleton Worms Molluscs Arthropods Echinoderms Jointed legs Poriferans Cnidarians 1- Acuatic animals 2- radial symetry -bag-like shape -Umbrela shape 3- Tentacles 1- Acuatic animals 2- No symetry/radial symetry 3- Full of pores Nutrition function - No complex systems - Filter feeders (choanocytes) Interaction function - Attached to a substrate - Body supported structure: Needle-like structures: spicules Reproduction Asexual reproduction by budding Nutrition function Gastrovascular cavities (mouth) Interaction function - Coral and Hydrae attached to a substrate - Tentacles full of cnidocytes with a thread Reproduction Asexual reproduction by budding Most Primitive animals Poriferans Cnidarians Body protected with an exoskeleton Worms Molluscs Arthropods Echinoderms Jointed legs Worms 1- Acuatic /Parasits / terrestial 2- bilateral symetry 3- long and have soft bodies Nutrition function - Digestion/circulatory/excretory simple systems. - Cutaneous respiration Interaction function - Parasits - Regenerate part of their bodies -They move in the earth by little hairs Reproduction - Sexual reproduction: Hermaphrodites - Asexual reproduction: fragmentation flat-worm: Platyhelminthes Plannarians tapeworm Round-worm: Nematodes ring-worm: Annelides Earth-worm Flat-worm Most Primitive animals Poriferans Cnidarians Body protected with an exoskeleton Worms Molluscs Arthropods Echinoderms Jointed legs Molluscs 1- Acuatic or terrestial 2- bilateral symetry 3- they have a protective shell Parts of the body organized for vital functions: Head – sense organs for Interaction function Muscular food – moving, digging or catching prey (interaction function) Visceral mass – organs for nutrition function and sexual reproduction (hermaphrodites or have both different sex) Gastropods (Snails, slugs, limpets) Shell: spiral shape Radula: Mouth *herbivorous Bivalve (mussels, clams, oysters) Shell: 2 valves * Water filters Chephalopods (Internal Shell, Tentacles and mandible) *carnivorous Most Primitive animals Poriferans Cnidarians Body protected with an exoskeleton Worms Molluscs Arthropods Echinoderms Jointed legs Arthropods 1- Aquatic/ terrestial / adapted to fly 2- bilateral symetry 3- bodies protected with exoskeleton 4- Jointed appendages Parts of the body organized for vital functions: Singularities regarding their vital functions Nutrition function Excretory system: Malpighian tubes Respiratory system: tracheae (internal tubes ending in a operture) Interaction function Simple or Compound eyes Head --- Thorax --- Abdomen Cephalothorax --- Abdomen Head -------------- trunk Reproduction Oviparous and some undergo Metamorphosis (they molt their exoskeletom) (complete or incomplete) Most Primitive animals Poriferans Cnidarians Body protected with an exoskeleton Worms Molluscs Arthropods Jointed legs Arthropods Jointed legs Apendages related to their mouth Number of pair of legs 3 pairs Repetitions of 1 or 2 pair of legs At least 5 pairs Echinoderms Most Primitive animals Poriferans Cnidarians Body protected with an exoskeleton Worms Molluscs Arthropods Jointed legs Echinoderms 1- Marine animals. Present at different depth levels 2- radial symmetry and many different shapes 3- their exoskeleton is under a thin cell layer the body is organized regarding its unique AMBULACRAL SYSTEM: Usefull mainly for the interaction function: For moving/ to breathe/to catch food Ambulacral system Echinoderms How sponges eat Snails moving through a knife Cnidocytes in Jellyfish Metamorphosis
