Lesson topic Mollusks.

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Presentation transcript:

Lesson topic Mollusks

We propose a riddle Аяғы, тұлға, басы бар, Аяғы бар басы жоқ, Аяғы, тұлға, басы бар, Аяғы бар басы жоқ, Сыртында сауыт тасы бар. Тұлғасы бар қарны тоқ. Ойланып көр балалар, Екі жақтау қорғаны, Шешуін оның табыңдар. Ол болмаса сорлады. (....) (....) Бақалшағы жоқ сыртында, Үккісі бар ұртында. Корегін ұстар таяғы, Арқанға ұқсас аяғы (.....)

Characteristics Soft-bodied invertebrate Covered with protective mantle

Mollusk Body Plan Muscular foot All mollusks have a similar body plan with three main parts: Muscular foot . Visceral mass – containing digestive, circulatory, respiratory and reproductive organs Mantle.

Class Gastropoda Gastropoda is the largest of the mollusk classes. 70000 named species.

Type of Shellfish Class Bivalvia Gastropoda Clam, Gyster, Slug snails, Cephalopoda Clam, Gyster, Slug snails, Sguid, Octopus, cuttlefish

Check of knowledge. Fourth excess

Information about molluscs Symmetry (............) – ............................. Body cavity(...............) –........................... Layers (............) – ........................................ Circulation (..................) – ........................... Respiration (.....................) – .......................... Excretion (.......................) – .................... Digestion (.....................) – ........................... Reproduction (................) – ........................

Information about molluscs mollu Symmetry (симметрия) – Bilateral (екі жақты) Body cavity(дене қуысы) –Coelomate(екінші қуысты) Layers (қабат) – Triploblastic (үш қабатты) Circulation (қан айналым) – Open (ашық) Respiration (тыныс алу) – Gills (желбезек) Excretion (зәр шығару) – Nephridia - нифридия Digestion (ас қорыту) – Complete (толық) Reproduction (көбею) – Sexual (жынысты)

I. Lets make revision answer to these guestions. Test 1 I. Lets make revision answer to these guestions. Test 1. Respiratory organs in snails A. Heart B. Gills C. Trachea D. Lung 2. Circulatori system in molluscs A. Open B. Closed C. Diffusion D. Open and closed 3. Which organ first appeared in molluscs A. Heart B. Mouth C. Liver D. Skin 4. Hou many chambers in molluscs heart A. 1 B. 2 C. 3 D. 4 5. Excretory organs in molluscs A. Protonephridia B. Creen glands C. Malpighian tubes D. Nephridia

II. Match the guestions to the answer 1. Gastropoda A. oyster, clan 2 II. Match the guestions to the answer 1. Gastropoda A. oyster, clan 2. Bibalvia B. snail, slug 3. Cephalopoda C. eartworm, leech 4. Chidaria D. sguid , octopus 5. Annelida E. hydra , medusa

True / folse guestions a. Molluscs life only in the seas b True / folse guestions a. Molluscs life only in the seas b. Molluscs bilateral symmetry c. The bodi consists of three parts d. Molluscs reproduce asexually e. Some predators f. Movement organs – leg