Question

Cartilaginous rings in respiratory passage are present in
(A) Trachea only
(B) Trachea and initial part of bronchi only
(C) Trachea, bronchi and initial bronchioles only
(D) Trachea, bronchi and all bronchioles​

Answer 1

Answer:

The answer is a option A

Answer 2

Answer:

The correct answer is Option C

Explanation:

Cartilaginous rings in the respiratory passage are present in the trachea, bronchi and initial bronchioles only.

• The respiratory tract in humans includes:

1. Trachea
2. Bronchi
3. Large bronchioles.
4. Small bronchioles
5. Fine Bronchioles
6. Respiratory Bronchioles
7. Alveoli

• The trachea is also called the windpipe it is supported by 12 C-shaped cartilaginous rings
• Bronchi are supported by 8 C-shaped tracheal rings.
• Large bronchioles are supported by Cartilaginous plates.
• Other parts of the respiratory tract are not supported by Cartilaginous rings.
• Other than Cartilaginous support Trachea, bronchi, large bronchioles, small bronchioles and fine bronchioles are supported by the Tunica externa layer.
• The entire respiratory tract is also lined by epithelium tissue.