MICROANATOMY

Detailed explanation-1: -Below the larynx lies the trachea, a tube about 10 to 12 cm (3.9 to 4.7 inches) long and 2 cm (0.8 inch) wide. Its wall is stiffened by 16 to 20 characteristic horseshoe-shaped, incomplete cartilage rings that open toward the back and are embedded in a dense connective tissue.

Detailed explanation-2: -A normal trachea (windpipe) has many rings made of cartilage (a strong and flexible tissue). These rings are C-shaped and support the trachea but also allow it to move and flex when your child breathes.

Detailed explanation-3: -The cartilage of the trachea is considered hyaline cartilage: simple, transparent, and made primarily of collagen. The trachealis muscle connects the open ends of the C-shaped rings of cartilage and contracts during coughing, reducing the size of the lumen of the trachea to increase the air flow rate.