Which of the following statements is incorrect?
1. The tracheal mucosa consists of pseudostratified ciliated columnar epithelium.
2 .The trachealis muscle and elastic connective tissue allow for changes in the diameter of the trachea.
3. The trachea is located posterior to the esophagus and extends from the larynx to the superior border of the fifth thoracic vertebra.
4. The trachea has incomplete hyaline cartilage rings.

The trachea is located posterior to the esophagus and extends from the larynx to the superior border of the fifth thoracic vertebra.

Explanation:

This is a wrong  statement. Anatomically ,this organ of upper respiratory system is located anterior to the oesophagus.Thus it  is the oesophagus that is located posterior to the trachea.

It passes through the posterior mediastanium to branch into the left and right main bronchi.

it  bends towards it ends to the right,which results in the crossing of the left main bronchus anteriorly to the oesophagus.

It is lined by mucus gland produced by pseudo stratified columnar cells and some ciliated and non ciliated cells.

The mucus helps in warming up inhaled air and filtration of the air of dust particles.

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.