Pancreas – Its main roles are secretion and absorption, and made with simple cuboidal epithelium. The remaining tissue of the pancreas is made up of endocrine cells called islets of Langerhans. Group of cells resemble grape clusters and produce hormones that controlling blood sugar and pancreatic secretions.

Esophagus – The esophagus is a tube that connects the pharynx (throat) to the stomach (esophagus). It measures approximately 8 inches (20 centimeters) in length. The esophagus, on the other hand, isn’t merely a hollow tube down which food slides like a water slide. Muscles in the esophagus contract to transport food to the stomach.

Gallbladder – The gallbladder is a pear-shaped organ located in the upper right abdomen. Bile is stored in your gallbladder and released to help your digestive system break down fat. Simple Epithelium Columnar.

Stomach – The stomach is a muscular organ found on the upper abdomen’s left side. The esophagus delivers food to the stomach. When food reaches the end of the esophagus, it passes through a muscle valve known as the lower esophageal sphincter and into the stomach. The stomach produces acid and enzymes that aid in the digestion of meals.

Liver – The liver is the largest solid organ in the body. It removes toxins from the body’s blood supply, maintains healthy blood sugar levels, regulates blood clotting, and performs hundreds of other vital functions. It is located beneath the rib cage in the right upper abdomen.

Pharynx – The pharynx, commonly called the throat, is a muscular, funnel-shaped passageway inside the body. It connects the mouth and nose to the esophagus (leading to the stomach) and larynx (leading to the trachea and then lungs)

Small Intestine – A long tube-like organ that connects the stomach and the large intestine. It is about 20 feet long and folds many times to fit inside the abdomen. The small intestine has three parts: the duodenum, jejunum, and ileum. It helps to further digest food coming from the stomach.

Large Intestine – It follows from the small intestine and ends at the anal canal, where food waste leaves your body. The large intestine, also called the large bowel, is where food waste is formed into poop, stored, and finally excreted. It includes the colon, rectum and anus.

Salivary Gland –The salivary glands are exocrine glands that are positioned in the head, in and around the oral cavity and secrete their salivary contents into the mouth. Their function is to help keep the oral mucosa protected and lubricated.