Page 52 - PowerPoint Presentation

RAZLIKE KOD OĈNIH APARATA DNEVNIH I NOĆNIH ŢIVOTINJA

DIFFFERENCES BETWEEN THE EYEBULB OF DAY AND NIGHT ANIMALS

Autor: Sara Mladenovid , VII razred, OŠ ,, Vladislav Petkovid Dis’’

Mentori: prof. biologije Snežana Ilid-Jankovid, OŠ ,, Vladislav Petkovid Dis’’, Beograd

Rezime

Oko je naziv za organ čula vida višedelijskih životinja. Evoluciono, prve oči predstavljaju, u stvari,

molekulske agregacije fotoreceptora u jednodelijskim organizmima (protista). Sa ugrožavanjem građe

organizma fotoreceptori se premeštaju na određeno i konstantno mesto u organizmu gradedi prve
organe čula vida. Kod primitivnih životinja oči su ključne za početak brzih reakcija kretanja,
predatorstva ili bežanja. Kod izvedenijih organizama, čulo vida je samo jedno od primalaca informacija iz

spoljašnjosti, i ove informacije se integrišu u mozgu. Naravno, postoji mnogo razlika u očnom aparatu

raznih organizama, a neke od njih dete nadi u ovom radu.

Ključne reči: čulo vida, očna jabučica, fotoreceptori,vidno polje, disekcija, evolucija

Summary

An eye is a name for a visual organ found in multicellular animals. From the standpoint of evolution, the
“first“ eyes were, actually, molecular aggregates of photoreceptors of the single cell organisms.

Following the deterioration of the form of those organisms, photoreceptors were relocated to a specific
and permanent place within the same, forming the first visual organs. In primitive animals’ eyes were

essential in evolution of the quick muscular reactions as well as for their predatorial, advantages and,

when need be, for fleeing away to save their lives. In the case of the more complex organisms the
eyesight is just one of the receptors for the outside informations which, in their turn are being integrated
in brain.

Certainly, there are many differences in the occular apparates of different organisms, and some of them

you will find within the following pages.

Key words: vision(eyesight), eyebulb, photoreceptors, visual field, dysection, evolution