الثعبان أو الأفعى أو الحية هو حيوان زاحف من ذوات الدم البارد يتبع رتيبة Serpentes من رتبة الحرشفيات له جسم متطاول، مغطى بحراشف، ولا توجد له أطراف، أو أذنين خارجيتين، وجفون ولكن ثمة حواف في جسمه، يعتقد أنها كانت تمثل أطرافه التي تلاشت
مقطع فيديو من عالم الافاعي في الكائنات الحيّة Snake Documentary DEADLIEST SNAKES LIVING IN AFRICA | National Geographic BBC Wild Documentary 2016
Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes[2] that can be distinguished from legless lizards by their lack of eyelids and external ears. Like all squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads with their highly mobile jaws. To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca.
Living snakes are found on every continent except Antarctica, and on most smaller land masses; exceptions include some large islands, such as Ireland, Iceland, Greenland, the Hawaiian archipelago, and the islands of New Zealand, and many small islands of the Atlantic and central Pacific oceans.[3] Additionally, sea snakes are widespread throughout the Indian and Pacific Oceans. More than 20 families are currently recognized, comprising about 520 genera and about 3,600 species.[4][5] They range in size from the tiny, 10.4 cm (4.1 in)-long thread snake[6] to the reticulated python of 6.95 meters (22.8 ft) in length.[7] The fossil species Titanoboa cerrejonensis was 12.8 meters (42 ft) long.[8] Snakes are thought to have evolved from either burrowing or aquatic lizards, perhaps during the Jurassic period, with the earliest known fossils dating to between 143 and 167 Ma ago.[9] The diversity of modern snakes appeared during the Paleocene period (c 66 to 56 Ma ago). The oldest preserved descriptions of snakes can be found in the Brooklyn Papyrus.
زواحف-ثعبان-افعي-ثعابين-قوة-سم-هجوم-قوة-افلام-افلام وثائقية الثعبان أو الأفعى أو الحية هو حيوان زاحف من ذوات الدم البارد يتبع رتيبة Serpentes من رتبة الحرشفيات له جسم متطاول، مغطى بحراشف، ولا توجد له أطراف، أو أذنين خارجيتين، وجفون ولكن ثمة حواف في جسمه، يعتقد أنها كانت تمثل أطرافه التي تلاشت#زواحف_ثعبان_افعي_ثعابين_قوة_سم_هجوم_قوة_افلام_افلام_وثائقية
1,109افاعي افريقيا عالم الافاعيSnake Documentary DEADLIEST SNAKES LIVING IN AFRICA | National Geographic BBC Wild Documentary 2016
Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes[2] that can be distinguished from legless lizards by their lack of eyelids and external ears. Like all squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads with their highly mobile jaws. To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca.
Living snakes are found on every continent except Antarctica, and on most smaller land masses; exceptions include some large islands, such as Ireland, Iceland, Greenland, the Hawaiian archipelago, and the islands of New Zealand, and many small islands of the Atlantic and central Pacific oceans.[3] Additionally, sea snakes are widespread throughout the Indian and Pacific Oceans. More than 20 families are currently recognized, comprising about 520 genera and about 3,600 species.[4][5] They range in size from the tiny, 10.4 cm (4.1 in)-long thread snake[6] to the reticulated python of 6.95 meters (22.8 ft) in length.[7] The fossil species Titanoboa cerrejonensis was 12.8 meters (42 ft) long.[8] Snakes are thought to have evolved from either burrowing or aquatic lizards, perhaps during the Jurassic period, with the earliest known fossils dating to between 143 and 167 Ma ago.[9] The diversity of modern snakes appeared during the Paleocene period (c 66 to 56 Ma ago). The oldest preserved descriptions of snakes can be found in the Brooklyn Papyrus.
زواحف-ثعبان-افعي-ثعابين-قوة-سم-هجوم-قوة-افلام-افلام وثائقية
2,136الافاعي العاصرة عالم الافاعيوثائقي عن الأفاعي العاصره و خصوصاً ( الاناكوندا - المُشبكة )
1,204افعي الاناكوندا عالم الافاعيزواحف-ثعبان-افعي-ثعابين-قوة-سم-هجوم-قوة-افلام-افلام وثائقية
#ثعابين #افاعي #الاناكوندا
833انواع لدغات الافاعي عالم الافاعي
في الهند أكثر من 270 نوعا مختلفا من الأفاعي. ونظرا لتعرّض العشرات للدغات الأفاعي يوميا. تبرّع عالم يدعى" راملوسوايت آكر" بالقيام بملاحقة نشاط الأفاعي لمعرفة الطرق التي تهاجم بها ضحاياها. من خلال هذا الوثائقي سنتعرف عن قرب على طبيعة المجتمع الهندي، وأنواع الزواحف هناك وتحديد السامة وغير السامة منها.
1,194جزيرة الثعابين عالم الافاعيزواحف-ثعبان-افعي-ثعابين-قوة-سم-هجوم-قوة-افلام-افلام وثائقية
#جزيرة_الثعابين #افعي #ثعبان #افلام_وثائقية
990تكاثر وتوالد الافاعي عالم الافاعيبالفيديو كيف تتكاثر و تتوالد الافاعي - وثائقي عن الافاعي و الثعابين اكثر من رائع جدا يستحق المتابعة
عالم الحيوانات - الأناكوندا العملاقه/وثائقي عن الثعابين
زواحف-ثعبان-افعي-ثعابين-قوة-سم-هجوم-قوة-افلام-افلام وثائقية
#تكاثر #توالد #افاعي #ثعابين
901اصطياد الافاعي عالم الافاعيزواحف-ثعبان-افعي-ثعابين-قوة-سم-هجوم-قوة-افلام-افلام وثائقية
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