While Pew Research from 2015 puts adult smartphone ownership in the U.S. at 72 percent, thereâs some debate about smartphone ownership among children. The average age for a child to get their first smartphone is currently 10.3 years according to the recent Influence Central report, Kids & Tech: The Evolution of Todayâs Digital Natives. âSetting rules as part of a conversation with your child is going to be far less problematic in the long run.â
Definition of acetabulum. plural. acetabulums. or. acetabula. play \-lÉ\. 1 : a ventral sucker of a trematode. 2 : the cup-shaped socket in the hipbone.
The well-fitting surfaces of the femoral head and acetabulum, which face each other, are lined with a layer of slippery tissue called articular cartilage, which is lubricated by a thin film of synovial fluid. Friction inside a normal hip is less than one-tenth that of ice gliding on ice.ontributing a little more than two-fifths of the structure is the ischium, which provides lower and side boundaries to the acetabulum. The ilium forms the upper boundary, providing a little less than two-fifths of the structure of the acetabulum. The rest is formed by the pubis, near the midline.