Question

The trachea and bronchi are provided with C-shaped cartilaginous rings which
A. Are responsible for sound production.
B. Give them support and prevent their collapse.
C. Divide trachea and bronchi.
D. Give support to lungs.

Answer 1

In people, windpipe is a straight tube stretching out up to the mid-thoracic cavity, which separates at the degree of fifth thoracic vertebra into a privilege and left primary bronchi. Every bronchi goes through rehashed divisions to frame the secondary and tertiary bronchi and bronchioles winding up in exceptionally dainty terminal bronchioles. The tracheae, primary, secondary and tertiary bronchi, and beginning bronchioles are upheld by fragmented cartilaginous rings.

Complete answer:

The windpipe, additionally called the trachea, is essential for the way that provisions air to the lungs.
Any drawn out blockage, in any event, for a couple of moments, can cause passing.
The windpipe is about 4.5 inches long and 1 inch in width, and involves smooth muscle and a few c-molded rings of cartilages. The rings of cartilages give strength and help to keep the windpipe from imploding and closing off the aviation routes. The windpipe reaches out from the neck and partitions into two primary bronchi.
Basically like the windpipe, the two essential bronchi are situated inside the lungs. The correct bronchus is somewhat bigger than the left one. Along these lines, unfamiliar articles inhaled into the lungs regularly end up in the right bronchus. The bronchi are fixed with a similar sort of bodily fluid that lines the remainder of the respiratory tract.
More profound into the lungs, every bronchus is additionally separated into five more modest, secondary bronchi, which give air to the projections of the lungs. The secondary bronchi keep on expanding to shape the tertiary bronchi, which are additionally separated into terminal bronchioles.
There are upwards of 30,000 little bronchioles in every lung. They lead to the alveoli by method of alveolar channels.
Together, the windpipe and the two essential bronchi are alluded to as the bronchial tree. Toward the finish of the bronchial tree lie the alveolar conduits, the alveolar sacs, and the alveoli.

So, the correct answer is option B.

Note: The (windpipe) is a tube that stretches out from the lower edge of the larynx to the upper piece of the chest (over the heart). It has a system of cartilages to keep it open. These cartilages are formed like a minuscule horseshoe or the letter C and are found along the whole length of the windpipe. All the open segments of these cartilages are at the dorsal surface with the goal that the throat can swell out from the open segment during gulping. The motivation behind the windpipe is to lead air between the larynx and the lungs.The cartilaginous ring is C-formed on the grounds that the windpipe presses against the throat. It keeps the windpipe from falling during breath in and out. In people, there are around 15 to 20 inadequate C-molded cartilaginous rings.