موضوع معلومات عن العناكب العنكبوت بالانجليزي

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.