The human immunodeficiency virus (HIV) is a lentivirus (a subgroup of retrovirus) that causes HIV infection and acquired immunodeficiency syndrome (AIDS).AIDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive.Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype.IDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype.
Black Tortoise. The Black Tortoise or Black Turtle is one of the Four Symbols of the Chinese constellations. Despite its English name, it is usually depicted as a turtle entwined together with a snake. Further, in East Asia, it is not called after either animal but is instead known as the Black Warrior under various local pronunciations.
Green Sea Turtle Sea turtles are graceful saltwater reptiles, well adapted to life in their marine world. With streamlined bodies and flipper -like limbs, they are graceful swimmers able to navigate across the oceans. When they are active, sea turtles must swim to the ocean surface to breathe every few minutes. When they are resting, they can remain un-derwater for much longer periods of time. How did the green turtle get its name? The green sea turtle gets its name from the green-colored fat tissue under its shell. The fat has a green color because the adult turtleâs diet consists of seagrass and algae. The Hawaiian name for the green turtle is Honu. What do they look like? Green sea turtles actually do not look very green from the outside. Their carapace can be shades of black, gray, olive green, yellow or brown with a radiant pattern, stripes or irregular spots of black and white. Their belly is creamy white or yellow. However, they sometimes do look greenish because of algal growth that covers part of the carapace. The green sea turtles are the largest of the hard-shelled sea turtles, but have a compara-tively small head.