Organ Descriptions of Respiratory & Digestive System [Lab Practical 2] Flashcards
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
Bronchioles
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?
Tunics
The order of the tunics in the stomach, small intestine, & large intestine (the general alimentary canal) starting with the tunic farthest from the lumen
- Serosa
- Muscularis Externa
- Submucosa
- 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
