Morphology of the synovium during its differentiation and development in the mouse knee joint. A histochemical, SEM and TEM study.
The prenatal and postnatal development of the mouse knee joint was investigated by transmission and scanning electron microscopy. In the prenatal stage, following the appearance of a narrow intercellular cleft between two skeletal elements on the 16th fetal day, clefting extended into the lateral synovial mesenchyme. In some regions, the extension of the cleft was very rapid, but in a certain region (future fat pad region), it was somewhat slower. Macrophage-like cells appeared in the synovial mesenchyme on the 16th fetal day, and then increased in number, and were distributed as if they were clustering around the presumptive clefting zone in the future fat pad region on the 17th-18thshots at a passenger, injuring no one but leaving a bullet in the side of a light-rail train. The next month, officers shot and killed a knife-wielding man near the station.

In April, a man fatally stabbed a fellow rider on a crowded bus at a transfer location at West Colfax Avenue and Federal Boulevard. Less than 48 hours later, another man slashed a woman with a box-cutter as they rode a bus near East Colfax Avenue and Fillmore Street.

Gavin Fleishman, 15, who was waiting at the Five Points station on Tuesday, said he saw a fight aboard a train last week, but he still feels safe.

“I feel safe when I am riding the bus,” he said. “But there should still be more precautions.”

Sadie Gurman: 303-954-1661, sgurman@denverpost.com or twitter.com/sgurman