Question

Vocal cords occurs in
A. Pharynx
B. Glottis
C. Bronchial tube
D. Larynx

Answer 1

Vocal cords are the folds of the tissue located in the voice box. It performs three main functions. They are protecting the airway from choking on material in the throat. It regulates flow of air to the lungs. It provides or projects the sounds for the speech. Voice box consists of two glistening white vocal folds and it forms a V shaped structure. Superior of the vocal folds called as the false vocal folds. It projects inside of the larynx and edges are vibrated during the passing of airstream to produce the voice.

Complete answer:
Option A: Pharynx is the throat, it is the passage from the skull to the sixth cervical vertebra. It serves both digestive and respiratory systems. It is done because of receiving air from the nasal cavity and food, water from the oral cavity. It is a long tubular pathway so it doesn't contain any organs. But it is classified as three sections. They are nasopharynx, oropharynx and laryngopharynx. Option A is incorrect.
Option B: The middle part of the larynx is called the glottis. It is responsible for voice modulation by performing expansion and contraction operations. It is the narrowest part of the larynx and it opens in the airway. Epiglottis is used to avoid the entering of food into the airway during the swallowing of food. Option B is incorrect.
Option C: Bronchial tubes are presented in the lungs. During the process of breathing the air comes and out from the trachea. From this place the air is passed through the bronchial tubes. It performs the breathing operation. This is also called the bronchi or airways. Option C is incorrect.
Option D: Larynx is commonly called the voice box. It is used to transfer the air from pharynx above and trachea below. Larynx is divided into sections. They are sub larynx, larynx and supra larynx. It is presented in the neck. Vocal cord presents in the larynx. Option D is correct.

Therefore, Option D is the correct answer.

Note:
Larynx is bigger for male and smaller in size for females. So Adam's apple is much bigger in the male compared to the female. Vocal cord presents in the upper end of the larynx. It is used to produce the speech. It describes the pitch of the speech or voice. For females, the pitch of voice is less compared to the male. It depends on the size of the larynx. Larynx is sometimes called Adam's apple. Larynx is called the phonatory system because it produces the sound.