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.
Lesson Summary. Trabeculae are thin columns and plates of bone that create a spongy structure in cancellous bone, which is located at the ends of long bones, and in the pelvis, ribs, skull, and vertebrae.one tissue is formed by cells called osteoblasts and is secreted in rings called lamellae that expand outward as the trabeculae get larger. As new tissue grows around the osteoblast, a hard ceramic material called calcium phosphate begins to surround the cell.