Each woman filled in a questionnaire about the extent of her hair loss and had her iron level (serum ferritin) tested. Among the women who described their hair loss as excessive, 59% had low iron stores compared to the remainder of the population. Decreased Serum Ferritin is Associated with Alopecia in Women.
The upper shell of the turtle is called the carapace. The lower shell that encases the belly is called the plastron. The carapace and plastron are joined together on the turtle's sides by bony structures called bridges. The inner layer of a turtle's shell is made up of about 60 bones. It include parts of the backbone and the ribs, meaning the turtle cannot crawl out of its shell.
Turtles are reptiles of the order Testudines (or Chelonii) characterised by a special bony or cartilaginous shell developed from their ribs and acting as a shield. Turtle may refer to the order as a whole (American English) or to fresh-water and sea-dwelling testudines (British English).urtles have rigid beaks, and use their jaws to cut and chew food. Instead of having teeth, which they appear to have lost about 150-200 million years ago, the upper and lower jaws of the turtle are covered by horny ridges. Carnivorous turtles usually have knife-sharp ridges for slicing through their prey.