نصب | <۱۰ |
از ۰ رأی | ۰ |
دستهبندی | آموزش |
حجم | ۱۳ مگابایت |
آخرین بروزرسانی | ۸ آبان ۱۴۰۰ |
نصب | <۱۰ |
از ۰ رأی | ۰ |
دستهبندی | آموزش |
حجم | ۱۳ مگابایت |
آخرین بروزرسانی | ۸ آبان ۱۴۰۰ |
Elephants are large mammals of the family Elephantidae and the order Proboscidea. Three species are currently recognised the African bush elephant (Loxodonta africana) the African forest elephant and the Asian elephant. Elephants are scattered throughout sub-Saharan Africa South Asia and Southeast Asia. Elephantidae is the only surviving family of the order Proboscidea members of the order include deinotheres gomphotheres mammoths and mastodons.
Elephant ears have thick bases with thin tips. The ear flaps or pinnae contain numerous blood vessels called capillaries. Warm blood flows into the capillaries helping to release excess body heat into the environment. This occurs when the pinnae are still, and the animal can enhance the effect by flapping them. Larger ear surfaces contain more capillaries and more heat can be released. Of all the elephants African bush elephants live in the hottest climates and have the largest ear flaps. Elephants are capable of hearing at low frequencies and are most sensitive at 1 kHz.
The trunk or proboscis is a fusion of the nose and upper lip although in early fetal life the upper lip and trunk are separated. The trunk is elongated and specialised to become the elephant's most important and versatile appendage. It contains up to 150,000 separate muscle fascicles with no bone and little fat. These paired muscles consist of two major types superficial and internal. The former are divided into dorsals ventrals and laterals while the latter are divided into transverse and radiating muscles. The muscles of the trunk connect to a bony opening in the skull. The nasal septum is composed of tiny muscle units that stretch horizontally between the nostrils. Cartilage divides the nostrils at the base. As a muscular hydrostat the trunk moves by precisely coordinated muscle contractions. The muscles work both with and against each other. A unique proboscis nerve formed by the maxillary and facial nerves runs along both sides of the trunk.
An elephant's skin is generally very tough at 2.5 cm thick on the back and parts of the head. The skin around the mouth anus and inside of the ear is considerably thinner. Elephants typically have grey skin but African elephants look brown or reddish after wallowing in coloured mud. Asian elephants have some patches of depigmentation particularly on the forehead and ears and the areas around them. Calves have brownish or reddish hair especially on the head and back. As elephants mature their hair darkens and becomes sparser but dense concentrations of hair and bristles remain on the end of the tail as well as the chin genitals and the areas around the eyes and ear openings. Normally the skin of an Asian elephant is covered with more hair than its African counterpart.
Elephant wallpapers for your phone or tablet!
- This feature can tap on the screen and make the image immediately.
- It has support for landscape mode and portrait mode switching screen.
- Beautiful background free and fun are waiting for you!
Instructions to install:
Home - Menu -> Wallpapers.
Movements and flashing light keeps changing with time.
- You can choose from several different styles.
- HD Graphics and Open GL
- Battery usage optimization.
- Compatible with 99% of mobile phone accessories.
- Aeroplane pictures fully supports landscape and look amazing on tablet devices.
Please contact us if you have any problems with our application.
* Android is a trademark of Google.