The CpG PAMP is recognized by the pattern recognition receptor (PRR) Toll-Like Receptor 9 (TLR9), which is constitutively expressed only in B cells and plasmacytoid dendritic cells (pDCs) in humans and other higher primates.
The trachea is an important structure within your respiratory system, which is the organ system that delivers oxygen to your bloodstream. The trachea is a rigid tube that conducts air from your larynx to your bronchi. The trachea's rigidity is maintained by a series of cartilaginous rings arranged along its length called C-shaped cartilage rings.
Trachea. Trachea is also known as the windpipe, and it is the tube that connects the lungs with the pharynx. Trachea allows the passage of air, being taken through nostrils, into the lungs.The trachea is about 10 â 16 centimetres long and contains an inner lining of pseudo stratified ciliated columnar cells.herefore, one should understand the simple differences between oesophagus and trachea, and this article would be important to follow in that regard. Esophagus. Esophagus (or Oesophagus) is the muscular tube that connects pharynx with the stomach of the vertebrates.