ANTIQUE VINTAGE 1930 SINGER TREADLE SEWING MACHINE & CABINETUp for sale is this 1930 Singer Treadle Sewing Machine (Model 99-13). It is in good condition, with some wood peeling on the corners and an arm missing from the lower flywheel, though still has its original belt.ebay.com.
{Ribs+Sternum = Rib cage}. Rib cage has 12 pairs of ribs or 24 in number. Ribs are divided in three categories on the basis of their size and their connections with the front side of skeleton. True ribs - First 7 pairs {1â7} of rib bones are called true ribs. They connect strernum {breast bone} with coastal cartilage in the front and to the spine at the back by ligaments. [coastal cartilage is elastic in nature and helps the ribcage to expand during respiration].
How Many Ribs Do Humans Have Sep 18, 2011 It is widely known that all vertebral species have ribs 1. Humans have a complex rib cage 2 which comprises of the sternum 3, ribs and some other parts. Every doctor knows how many ribs people have, but an ordinary man can have some difficulties with such a question.