

Dihala, srce in spolni organi čebel
Presentation
•
Biology
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8th - 9th Grade
•
Hard
Dušanka Klančar
FREE Resource
8 Slides • 0 Questions
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Dihala, srce in spolni organi čebel

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DIHALA
Po letenju se čebela usede, da se odpočije. Močno giblje obročke na zadku.
Skozi deset parov dihalnic vdihava kisik, da obogati kri.
Izdihava skozi tretjo največjo dihalnico na oprsju.
Izdihava ogljikov dioksid.
Dihalnice se nadaljujejo v sapnice.
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SRCE
To je cevast organ, ki poteka vzdolž hrbtnega dela zadka.
Razdeljeno je v pet prekatov, ki jih ločujejo gube.
Srčna mišica se širi in krči ter potiska hemolimfo v smeri proti glavi.
Organe in tkiva oskrbuje s hranilnimi snovmi. Presnovne ostanke prenaša do organov za izločanje.
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SPOLNI ORGANI MATICE
Spolni žlezi matice sta jajčnika.
Posamezni jajčnik sestavlja 160 do 180 jajčnih cevk.
V njih se razvijejo jajčne celice.
V vseh cevkah na dan dozori 2.000 jajčec in več.
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Oprašena matica ima v semenski mošnjici spravljene spermije večjega števila trotov. Semenčice potujejo po tanki cevki iz semenske mošnjice proti nožnici. Na poti oplodi jajčece.
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SPOLNI ORGANI TROTA
Trot je samec, opraši mlado matico. Njegovi spolni žlezi sta modi, ki sta sestavljeni iz semenskih cevk. Spolni ud trota je troba. Le-ta se razširi v izboklino, ki ji pravimo čebulica.
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ČUTILA
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Dihala, srce in spolni organi čebel

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