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Elastic Cartilage The epiglottis is an elastic cartilage structure at the base of the tongue that folds over the glottis when swallowing to avoid food or fluids from reaching the trachea. Elastic cartilage is identical to hyaline cartilage, but it has a dense network of branching elastic fibers in its matrix.

Simple Squamous Epithelium The small, sacs known as alveoli found throughout the lungs are lined by Simple Squamous Epithelia. Alveolar epithelial cells I (AEC I) occupy around 95% of the alveolar surface area and participate in exchange of gases. Alveoli transport oxygen from the respiratory system to the blood and CO2 from the blood back to the…[Read more]

Ciliated Pseudostratified Columnar Epithelium In the trachea and bronchi, the epithelium lining it is pseudostratified which largely comprises of three cell types: cilia, goblet, and basal cells. The cilia are found across the apical surface to help mucus move through the respiratory tract.

More at: https://bioscience.lonza.com/lonza_bs/PH/en/what-are-airway-cells-and-their-function#:~:text=Therespiratoryepitheliumintrachea,mucusacrosstheairwaytract. https://histologyguide.com//slideview/MH-038-039-epiglottis/05-slide-1.html

Liver: The liver is divided into two lobes: right and left. Hexagonally shaped lobules make up each lobe. These lobules are quite little, each made up of several hepatocytes (liver cells) that are arranged in radiating rows.

Gallbladder: The gallbladder is a muscular sac with a simple columnar epithelium lining it. In humans, it absorbs and contains bile from the liver through the hepatic and then cystic ducts, with a capacity of 50 to 100ml. It is linked to the liver's visceral layer.

Duodenum: The duodenum has three layers, which are similar to all hollow organs of the GIT, but it also has Brunner's glands, which are the duodenum's distinguishing feature. It is the first of the three segments of the small intestine, receiving partly digested food from the stomach and beginning nutrient uptake. It is directly connected to the…[Read more]

Read more at: https://www.upmc.com/services/liver-cancer/liver/anatomy-liver#:~:text=Lobules,lineupinradiatingrows. https://www.histology.leeds.ac.uk/digestive/gallbladder.php https://www.kenhub.com/en/library/anatomy/the-duodenum

Esophagus: A stratified squamous epithelium lines the esophagus for protection. It is non-keratinized since it is rarely exposed to dehydration or abrasions. Lubrication is provided by scattered submucosal mucous glands. The peristalsis of passed food is provided by a well-developed muscularis.

Large Intestine: The large intestine, sometimes known as the large bowel, is the last section of the digestive system. Its job is to absorb water from the food content that remains after digestion and then pass the waste material out of the body. Simple columnar epithelium lines the large intestine's inner wall. Goblet cells can be found in both…[Read more]

Appendix: The appendix has the same structure as the large bowel: serous, muscular, submucous, and mucous. The lamina propria of the appendix contains extensive clumps of lymphoid tissue that protrude into the lumen. These collections are most noticeable in childhood and gradually fade with adulthood. Columnar epithelium lines the appendix mucosa,…[Read more]

Read more https://www.healthdirect.gov.au/digestive-system#:~:text=Thedigestivesystemismade,intestinelargeintestineandanus. https://histology.siu.edu/erg/esoph.htm#:~:text=Theesophagealliningisprotected,providesperistalticpropulsionoffood.…[Read more]