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Lab Experiment 6: Histology of Body SystemsLOOKING AT THE LIVER UNDER THE MICROSCOPE : →Liver is made up of a lot of cylinders called Hepatic lobules.→ The Hepatic lobules are made up of sheets of liver cells called Hepatocytes.→There is a center vein that passes through the middle of the Hepatic lobules that drain the blood from the microscopic structures and then eventually the liver itself.→ The interior of the liver under the microscope, think of spreading open a book cover to cover- The whole represents the central vein.- Each page of the book represents a sheet of the hepatocyte.- In between each sheet of hepatocyte there are channels called Sinusoids. →Sinusoids are blood channels that lead away from the central vein in the hepatic lobules.- Sinusoids contain some phagocytic cells (can’t see under the microscope).●Kupffer Cells: work to clean the blood and remove any debrisfrom the blood in the liver.Hepatic Lobule under the microscope at the lowest power :→ The white dot in the center of the Lobule is the Central Vein→ eventually drain into the Hepatic Vein.
Hepatic Lobule under the microscope with Increasing Magnification: → The Red-ish areas are the Hepatocytes.→ The white lines in between the red areas are the Sinusoids.LOOKING AT THE PANCREAS UNDER THE MICROSCOPE :→Pancreas is a gland in the digestive system and considered Endocrine and Exocrine Glands. → The Endocrine Portion: Secretes hormones like insulin and glucagon to control the blood sugar levels in our body.→ The Exocrine Portion: Secretes digestive enzymes and juices that help to complete the digestive process.Pancreas at the Lowest Power:→ You can see several oddly shaped lobules. →Each lobule has a boundary of a white line around it.
Pancreas at a Higher Magnification:→As you can see, some of the cells are different colors. → The darker cells that are stained a dark pink= Acini Cells(digestive cells).o 98-99% of the pancreas is made up of the Acini Cells; they make up the exocrine portion of the gland.o Acini Cells secrete the pancreatic juices and enzymes that help with digestion.→The lighter color larger pink cell = Islets of Langerhan.o Islets of Langerhan:It’s the endocrine portion of the gland that will produce insulin and glucagon hormones to regulate our blood sugar levels. LOOKING AT THE SMALL INTESTINE UNDER THE MICROSCOPE :→The small intestine absorbs all of our nutrients and passes them into the bloodstream.