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Cross-section of the esophagus showing, from the central region outward, the lumen, mucosa, submucosa, a muscularis externa, and a thin adventia or serosa. SEM X60

Cross-section of the esophagus showing, from the central region outward, the…

Cross-section of the mammal colon or large intestine. From the lumen outward are the mucosa, submucosa, muscularis externa, and the thin outer serosa. The highly folded layers are typical of an empty organ. SEM X60.  **On Page Credit Required**

☤ MD ☞☆☆☆ Cross-section of the mammal colon or large intestine. From the lumen outward are the mucosa, submucosa, muscularis externa, and the thin outer serosa. The highly folded layers are typical of an empty organ. SEM **On Page Credit Required**

Blood Clot

scienceyoucanlove: “ Blood clot by James Archer A thrombus, or blood clot, is the final product of the blood coagulation step in hemostasis. Blood clotting is an important mechanism to help the body.

Ciliated and nonciliated cells of the pseudostratified epithelium that lines the trachea. SEM X4200  **On Page Credit Required**

Ciliated and nonciliated cells of the pseudostratified epithelium that lines the trachea. Randy Kardon/Tissues & Organs/Visuals Unlimited, Inc.

False-color SEM of retina featuring central fovea, a crater-like depression in the photosensitive layer of the eye. The foveal retina is the area of greatest visual acuity and contains only cone receptor cells.

False-color SEM of retina featuring central fovea, a crater-like depression in the photosensitive layer of the eye. The foveal retina is the area of greatest visual acuity and contains only cone receptor cells.

Peyer's patches (green), coloured scanning electron micrograph (SEM). These regions of lymphoid tissue are found in the human intestine, usually in the ileum, the final section of the small intestine. Their function is to defend against infection in the intestines, where large numbers of pathogenic microbes are found. #microscope #photography #human

Peyer's patches (green), coloured scanning electron micrograph of lymphoid tissue found in the human intestine, usually in the ileum

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