planaryalar ne demek?

Planaryalar, (ya da Latince Turbellaria) Yassısolucanlar şubesine ait genellikle küçük (<1 – 60 cm) ve serbest yaşayan üyeleri kapsayan bir sınıftır.

Günümüzde karışık (polifiletik) bir grup olarak Acoela ve Nemertodermata olarak ayrılmıştır.

Hareketleri sillerle sağlanan canlılardır. Çoğunluğu etçildir. Çoğu türleri denizlerde ve tatlısularda bulunurken, bazıları nemli yerlerde de yaşayabilir. Planaryalar hermafrodit oldukları için eşeyli, rejenerasyonla da eşeysiz üreyebilirler. Planaryada merkezi sinir sistemi bulunur. Serbest yaşarlar (parazit değil). Dolaşım sıvısı yoktur. Sahip olduğu kasların (sirkular kaslar, parenkimal kaslar, longitudinal kaslar, faringeal kaslar) hareketi vücut boşluğundaki maddelerin iletimini sağlar. Vücutları segmentsizdir.

Kitaplar

Abramson, C. I., Kirkpatrick, D. E., Bollinger, N., Odde, R., & Lambert, S. (1999). Planarians in the classroom: Habituation and instrumental conditioning. Washington, DC: American Psychological Association.
Sheiman, I. M., & Tiras, K. P. (1996). Memory and morphogenesis in planaria and beetle. Westport, CT: Praeger Publishers/Greenwood Publishing Group.

Makaleler

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