Mollusks

Zamkati

• Mitundu ya nkhono zam'madzi
• Makhalidwe Abwino
• Kudyetsa
• Chikhalidwe
• Zitsanzo za mollusks

Mollusks ndi nyama zopanda mafupa zomwe zimakhala ndi thupi lofewa lokhala ndi phazi lolimba lomwe limakutidwa ndi khungu kapena chipolopolo cha calcium. Nthawi zambiri zimakhala nyama zam'madzi.

Mitundu ya nkhono zam'madzi

Pali magulu atatu osiyanasiyana kapena mitundu ya nkhono zam'madzi:

• Zilonda zam'mimba. Nkhono ndi slugs. Pafupifupi 80% ya mollusks ali mgululi.
• Cephalopods. Octopus, squid ndi cuttlefish. Ndi gulu locheperako koma limasintha kwambiri.
• Otsutsa. Mu gululi muli ziphuphu, nkhono ndi nkhono. Chikhalidwe cha kagulu kawo ndikuti ndi okhawo mwa magulu atatu omwe alibe radula. Kuwomba, mamazelo ndi nkhono. Ndiwo okhawo omwe alibe radula.

Makhalidwe Abwino

• Dongosolo kupuma. Mitundu yambiri ya mollusks imapuma kudzera m'mitsempha, ngakhale mitundu ina yapanga dongosolo la kupuma kwamapapo.
• Dongosolo m'mimba. Mollusks amadyetsa kudzera mu chiwalo chotchedwa radula yomwe imapangidwa ngati lilime. Amatchedwanso chovala, chiwalochi chimakwirira masentimita ndipo mitundu ina imatulutsa calcium carbonate kuti apange chipolopolocho.
• Njira yoyendera. Ali ndi mtima, aorta, ndi mitsempha yamagazi.
• Njira yoberekera. Mollusks ndi oviparous, ndiye kuti, amaberekanso mwa kuyikira mazira achikazi. Khalidwe lawo ndi lokhalokha, sikumawonekera kawirikawiri m'magulu, pokhapokha akakwatirana. Mollusks ambiri ndi a hermaphrodites.

Kudyetsa

Mitundu yamadyedwe am'madzi imasiyanasiyana malinga ndi mtundu uliwonse. Nthawi zambiri, nkhono zapamtunda ndi ziweto zomwe zimadya nyama zakutchire, pomwe nkhono zam'madzi ndizodya nyama, ngakhale zimadyanso pa plankton ndi algae.

Chikhalidwe

Pogwirizana ndi malo awo okhala, nkhono zam'madzi zimatha kukhala pansi pamadzi, pansi pa nyanja (zimapanga 23% ya nyama zonse zam'madzi ndi zam'madzi), koma amatha kuzolowera ndikukhala mamitala 3,000 pamwamba pamadzi pamtunda.

Zitsanzo za mollusks