Organ Descriptions of Respiratory & Digestive System [Lab Practical 2] Flashcards Preview

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Flashcards in Organ Descriptions of Respiratory & Digestive System [Lab Practical 2] Deck (14):

The trachea branches into 2

Primary bronchus, one of which leads into each of the two lungs


These bronchi (primary bronchus) branch into passageways named



The bronchioles continue to branch throughout the lung, getting smaller and smaller with each branch until they terminate at

Alveoli = small sacs


What are the 3 types of acini in the salivary glands?

Mucous acini -- produce mucus, a thick, viscous substance that helps lubricate the food being chewed
Serous acini -- produce serous; a thin, watery substance containing digestive enzymes
Serous demilunes -- contain a combination of both serous cells and mucous cells


What is the term for the 4 layers of tissue in the stomach, small intestine, and large intestine?



The order of the tunics in the stomach, small intestine, & large intestine (the general alimentary canal) starting with the tunic farthest from the lumen

1. Serosa
2. Muscularis Externa
3. Submucosa
4. Mucosa


The stomach has a very thick muscularis externa because it has a third layer of smooth muscle called

Inner oblique layer


Important cells of the gastric glands

Parietal & Chief cells


Parietal Cells of the stomach

Have a clear, bright pink cytoplasm with a circular purple nucleus
Secrete hydrochloric acid and intrinsic factor


Chief Cells of the stomach

Very small, irregularly shaped purple cells that seem to cluster around parietal cells near the base of the gastric gland
Secrete pepsin


Plicae Circulares of small intestine

Increase surface area by outfolds in the submucosa


Colon/Large intestine continues to absorb moisture and lubricates the food stuff, preparing it for excretion by these two cells

Absorptive cells
Goblet cells


Acini in the pancreas secrete

Trypsinogen, amylase, lipase, and nucleases


Islets of Langerhans

Cell clusters in the pancreas that secrete insulin and glucagon