معلومات قصير موضوع انجليزي بحث تقرير بالانجليزي باللغة
الانجليزية انشاء
موضوع عن الحيوانات الاليفة وانواعها
اين تعيش ماذا ياكل مدة حياتها اسماء صغارها
تعبير عن الجمل بالانجليزي تعبير كتابي عن وصف حيوان
اليف عبارات قصيره للاطفال
information about
paragraph معنى
برزنتيشن معلومات بسيطه اسم
نطق كلمة معنى كلمة برجراف حيوان مفترس لاحم عاشب اليف متوحش وحيش الغابة
موسوعة عالم الحيوانات برمائي كل شيئ عن تزاوج انواع الانجليزي الشائعة معنى كلمة بالانجليزي اختصارات
معلومات عن الحيوانات بالانجليزي موضوع عن الحيوانات
الاليفة بالانجليزي دورة حياتها
تغذية الحيوانات والحشرات على ماذا تتغذى كيف تتغذى
الموسوعة تتذوق الطعام تصنيف
فوائد الجنس للصف الرابع للصف السابع الاول الثاني
الثالث الخامس السادس الثامن التاسع كتابة
ذكر اضرار معلومات طائر انواع تربية قصة صفات حديقة الحيوانات مقدمة خاتمة
عرض المزرعة لرياض الأطفال براعم لائحة اسماء الحيوانات العاشبة اللاحمة حيوانات
تاكل النباتات مختلطة التغذية تتغذى الغريزة الحيوانية الكائنات
المخلوقات الحياة البرية
Araneomorphs and Mygalomorphs are the two suborders
of spiders
Spiders (Araneae) are an order of invertebrate
animals of the arachnid class (Arachnida). This order is subdivided into two
suborders, Araneomorpha (Araneomorphae) and Mygalomorph (Mygalomorphae).
All spiders are made in two sections, the abdomen
and the cephalothorax. The cephalothorax is like a thorax that also includes
the head. They have eight eyes, usually in two rows, which give them excellent
vision and allow them to see around them. The eight legs are attached to the
cephalothorax, and their body is usually covered with hair.
The differences between the two sub-orders are not
always easy to observe, as sometimes hidden anatomical features are placed
under the spider. More than 93% of the spiders in the world are in the suborder
Araneomorphs in more than 90 families, and only 15 families in the suborder
Mygalomorphs, of which only 8 are found in North America.
The first thing that characterizes them is the
position of fangs and chelicères. In mygalomorphs, the fangs move up and down,
and these spiders must bite their prey from top to bottom as if to pierce them.
Photo of fangs and chelics of mygalomorphs
Fangs and chelics of mygalomorphs
In the more advanced version of the paneomorphs,
the fangs cross like a pair of pliers, allowing them to pinch their prey
without having to position it as precisely to bite them.
Photo of the fangs and cheliceres of the
araneomorphs
Fangs and cheliceres of the araneomorphs
Layered lungs, located below the abdomen, present
as a single pair in the araneomorphs, except for the families of
Austrochilidae, Gradungulidae and Hypochilidae which will have two pairs. In
mygalomorphs, the lungs in sheets are four, arranged in two pairs.
Pair of lungs in sheets of araneomorph
Another difference is the longer longevity of
Mygalomorphs that can continue to moult even as an adult. Some species can live
up to 25 years. For the Araneomorphs, the moulting stops once it has become
adult, and the spider will not usually live more than a year.
Pedipalps of a male spider
Pedipalps of a male spider
We can differentiate males and females, once adult,
by their pedipalpes. Males use them during breeding, and the end of them is
bigger, looking like boxing gloves. If the spider is not mature, the pedipalps
will not be fully functional, and their size will not be as marked.
All spiders are carnivorous animals, and they eat
only live prey that they have caught themselves. They launch on prey to bite,
inject venom, to paralyze. She will then inject it with a liquid that will
liquefy the inside, suck the contents, and then discard the empty skeleton of
the insect consumed.
In Canada, the bite of spiders is usually not
dangerous to humans, and usually causes only irritation and redness, except in
allergic people who may react more violently.
Spiders have an important place in the food chain
because they eliminate many insects. The predators that feed on them are mainly
birds, other spiders, amphibians and predatory insects.
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