Sea turtles maintain an internal environment that is to the ocean. To maintain hypotonicity they must excrete excess salt ions. Like other marine reptiles, sea turtles rely on a specialized gland to rid the body of excess salt ions, because reptilian kidneys cannot produce urine with a higher ion concentration than sea water. All species of sea turtles have a in the orbital cavity, capable of producing tears with a higher salt concentration than sea water.
Turtle vs Tortoise - Difference and Comparison | Diffen
The flesh of was eaten from Predynastic times to as late as the Old Kingdom, and later the flesh of turtles began to be considered an "abomination of Ra" and the role of these animals became an evil one. Turtle carapaces and scutes from Red Sea Turtles () were used in rings, bracelets, dishes, bowls, knife hilts, amulets, and combs. Land tortoise carapaces from were used as sounding boards for lutes, harps and mandolins. Turtle shells were also used to make norvas, an instrument resembling a .
What's the Difference Between Turtles and Tortoises?
Spill response and cleanup operations also can harm sea turtles unintentionally. Turtles can be killed after being struck by response vessels or as a result of oil burning and skimming activities. Extra lighting and activity on beaches can disrupt nesting and hatchling turtles, as well as incubating eggs.
Teenage Mutant Ninja Turtles and Power Rangers Crossover - YouTube
Green turtles (Chelonia mydas) are currently listed as endangered on the IUCN Red List. The species faces a number of threats, including illegal poaching and unbalanced sex ratios caused by warmer temperatures in nesting areas.In China, turtles and tortoises have long been used for food and medicine, and their shells were once a critical part of divination (they would be heated and the cracks interpreted). For medicine, the top shell (carapace) or the bottom shell (plastron) is used, depending on the animal. Tortoises, and most of the turtles, have hard protective shells made up of about 60 bones covered by plates called scutes. However, there is a "leatherback turtle" from the sea () which doesn't have the hard shell, but instead has a leathery skin supported by tiny bones (this is an adaptation that allows diving into deep sea water). There are also soft shelled land turtles, such as the widely used Far Eastern turtle (also known as ), which lives along rivers (it is considered by some to be a terrapin).