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
ذوات الدم الحار
بالانجليزي ذوات الدم الحار
من البشر ما هي ذوات صفات
اصحاب الدم الحار
Cold-blooded
animal does not control body temperature
Cold-blooded
animals, or poïkilotherme, can not control their internal temperature by
themselves, and are therefore at the mercy of the ambient temperature. Some
have to warm up once the day comes, in order to resume their normal activity.
The cold-blooded
animal can therefore withstand variations in body temperature, without
suffering or dying of hypothermia. When its temperature goes down, its
physiological activity slows down, like the speed of the cardiac drives. His
energy demand is reduced and if he is no longer active, he will be able to
survive on his energy reserves for a longer time.
Since they can
not regulate their temperature, through sweat or tremors, they use the elements
around them to achieve a stable body temperature. Once the temperature of the
body is appropriate, the animal can go about its business normally.
An ectothermic
animal is an animal whose heat is obtained by external means, such as the
alligator. This is why many cold-blooded animals will use the sun to warm up
once the cold night has passed. They are therefore often ectotherms, but
warm-blooded animals are too.
As the
environment is used to regulate the heat of the body, the cold-blooded animal
will therefore use the sun to heat, the fish adjust their depth according to
the temperature of the water. Desert insects hide under the sand or use the
friction of the wings or other limbs to warm up at night. Butterflies are
attracted to light, but they also like the heat it produces.
Photo of spotted
salamander
The salamander is
a cold-blooded animal
When the
temperature drops too much, cold-blooded animals become lethargic and this
makes them vulnerable. This is why they will usually hide so as not to become
too easy prey for predators. The frog will hide under a rock, a stump or other
object under which it can fit. If the cold lasts a long time, as for the winter
period, the activity of the organs will be so slow, that once spring comes, the
amphibian resumes its activity as if everything was normal.
This is an
advantage because when the environment becomes colder, the animal is not at
risk of hypothermia. However, when it is in a state of lethargy caused by the
cold, the animal is a very easy prey to capture. If the habitat where they live
becomes colder all the time, a race of cold-blooded animals can easily
disappear.
This is why when
we observe small animals, such as salamanders or toads, it is important to put
them back where we find them. If you move the animal and its metabolism is
slow, it is possible that it is not able to return to hide once your
observations are completed. Cold-blooded animals are very sensitive to their
environment which has a direct influence on them.
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