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احمد علي احمد علام

Assistant Professor

أستاذ مساعد

كلية العلوم
King Saud University, College of Science, Department of Zoology, Riyadh11451, Saudi Arabia
المنشورات
مقال فى مجلة
2016

Histology of the Skin of Three Limbless Squamates Dwelling in Mesic and Arid Environments.

AA, Allam . 2016

The skin of limbless squamates has an increased contact with the substrate compared with limbed counterparts. Comparatively, the contact with the substrate is intensified in fossorial species, where the whole circumference of the body interacts with the soil during underground locomotion. Although fossoriality in Squamata, specifically lizards and snakes, has been studied ecologically and morphologically (e.g., osteological changes), not enough detail is yet available regarding changes in organs critical for underground lifestyle such as the skin. Here we used histological and microscopical techniques (scanning electron microscopy and transmission electron microscopy) to uncover the structural detail of the epidermis and dermis in three limbless reptiles, the amphisbaenian Diplometopon zarudnyi, and two snakes, Indotyphlops braminus (Typhlopidae) and Cerastes cerastes (Viperidae). The skin of these taxa shows pronounced morphological diversity, which is likely associated to different environmental and functional demands upon these reptiles. 

نوع عمل المنشور
paper
مجلة/صحيفة
Anat Rec (Hoboken). 2016 Jul;299(7):979-89. doi: 10.1002/ar.23356. Epub 2016 May 5.
مزيد من المنشورات
publications

Nicotine exposure during pregnancy induces oxidative stress and leads to behavioral alterations in early childhood and young adulthood. The current study aimed to investigate the possible…

بواسطة 1) Jamaan S. Ajarem, Gadh Al-Basher, Ahmed A. Allam and Ayman M. Mahmoud
2017
publications

In the present study, it was hypothesized that micromorphology of the surface of many lizard scales appears to mimic the topography of the habitat in which they live. Many authors have suggested…

بواسطة 5) Allam AA, Abo-Eleneen R, ALOthman S.
2017
publications

The power of tumorigenesis, chemo-resistance and metastasis in malignant ovarian
tumors resides in a tiny population of cancer cells known as ovarian cancer stem cells (OCSCs).

بواسطة Amoura Abou-ElNaga, Ghada Mutawa, Ibrahim M. El-Sherbiny, Hassan Abd-ElGhaffar, Ahmed A. Allam, Jamaan Ajarem and Shaker A. Mousa
2017