Sana: 1- laboratoriya mashg’uloti

Zog’ora balaiq Lupa Suvli akvarium

Ishning borishi:

1. Baliqni suvli kengroq idishga olib, gavda tuzilishi, tanasining rangi, tangachalarining joylashishi aniqlanadi.

2. Baliq tanasining qorin va orqa tomonining rangi bir xilda bo’lmasligi sababini tushuntiring.

3. Bosh, gavda va dum qismlarining qo’shilib ketganligi, tanasining ikki yondan siqilganligi, yashash muhiti bilan qanday bog’liqligiga e’tibor bering.

5. Tirik baliq terisi shilimshiq bo’lishiga e’tibor berib uni nima ahamiyati borligini ayting.

6. Tangachalarining oldingi uchi teriga botib keyingi uchi terisiniing ustida turganligini kuzating.

7. Baliqning og’zi va ko’zining joylashuviga e’tibor bering, labi va ko’zining tuzilishini o’rganing.

8. Boshining ustida joylashgan burun teshiklari va ikki yonida joylashgan jabra qapqoqlarini o’rganing. Jabra qopqoqlarini ko’tarib jabra yoriqlarini toping.

9. Baliq tanasidagi juft va toq suzgichlarni o’rganing va vazifasini tushuntiring.

10. Akvariumdagi baliqning suzgichlarining harakatiga, jabra qopqog’ining ochilib yopilish mohiyatini tushuntiring. Shisha naycha bilan akvarium urilgandagi baliqning harakatini kuzating.

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