A group of nursing students are reviewing information about variations in the anatomy of a child's respiratory tract structures in comparison to adults. The students demonstrate an understanding of the information when they describe the shape of the larynx in infants as.

The shape of the larynx in infants are cone shaped.

Explanation:

The size of the larynx is small in comparison to the adult one.

The larynx lies on the 4th cervical vertebrae and the axis of the respiratory system is parallel with the axis of digestive system that helps the infants to breathe constantly and swallow liquid foods.

The larynx is covered by soft cartilage and relatively the lumen is narrow.

The vocal cord is small and 7-9 mm wide with sub glottis which is 5.5-6 mm wide.

Soft cartilage favors deformity of the larynx and trachea.

The upper end is cone shaped structure and the cricoid cartilage is backwardly directed. Short vocal cord and the epiglottis is narrow which is hang above the larynx.

The cricoid cartilage is hyaline type in infants that affects the coloring intensity.

The epiglottis is an elastic cartilage which is covered by mucus.

answer: a. a gene that causes a specific trait.

explanation: