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.
Respiratory System. The respiratory system of the turtle is modified to accomodate some peculiar morphological features. Notice the trachea, which has become elongated in response to the posterior migration of the heart and viscera and, in part, to the extendable neck (Lawson 1979).he shell of the turtle poses a special problem in the ventilation of the lungs. The rigidity of the shell prevents the use of the ribs in the aspiration pump. Alternatively, turtles possess sheets of muscle within the shell that, through contraction and relaxation, force air in and out of the lungs.