Lesson topic Mollusks
We propose a riddle
- 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
All mollusks have a similar body plan with three main parts:
- Muscular foot . Visceral mass – containing digestive, circulatory, respiratory and reproductive organs Mantle .
- 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
Cephalopoda
Class
Class
Gastropoda
Bivalvia
Clam,
Slug
Gyster,
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. 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. 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. Molluscs bilateral symmetry c. The bodi consists of three parts d. Molluscs reproduce asexually e. Some predators f. Movement organs – leg
