1. Elastic cartilage – Elastic cartilage, also known as yellow fibrocartilage, is a form of cartilage that gives specific portions of the body both strength and elasticity.

2. Esophagus – The esophagus is a muscular tube that connects the throat to the stomach (pharynx). The esophagus is around 8 inches length and coated with mucosa, a moist pink tissue. The esophagus is located behind the windpipe (trachea), in front of the heart, and behind the spine. The esophagus travels through the diaphragm just before entering the stomach.

3. Salivary glands- Saliva is produced by salivary glands, which improves digestion, keeps your mouth moist, and promotes tooth health. The parotid, sublingual, and submandibular salivary glands are located beneath and behind your jaw.

References:
Elastic cartilage. (2017). Kenhub. https://www.kenhub.com/en/library/anatomy/histology-of-elastic-cartilage#:~:text=Elastic%20cartilage%20%2C%20sometimes%20referred%20to,of%20the%20external%20auditory%20meatus.

‌Hoffman, M. (2009, September 11). Picture of the Esophagus. WebMD; WebMD. https://www.webmd.com/digestive-disorders/picture-of-the-esophagus

‌Salivary gland tumors – Symptoms and causes. (2020). Mayo Clinic; https://www.mayoclinic.org/diseases-conditions/salivary-gland-cancer/symptoms-causes/syc-20354151#:~:text=Salivary%20glands%20make%20saliva%2C%20which,%E2%80%94%20parotid%2C%20sublingual%20and%20submandibular.

‌