Anatomy Practical Exam Flashcards
Alimentary Canal
Whole passage along which food passes through the body from mouth to anus
Accessory Organ
Organ that helps with digestion but is not part of the digestive tract
Peritoneal Cavity
Potential space between parietal peritoneum and visceral peritoneum
Gastroesophageal Sphincter
A ring of smooth muscle fibers connecting esophagus and stomach
Pyloric Sphincter
Band of smooth muscle at junction of pylorus and duodenum
Duodenum
First part of the small intestine immediately beyond the stomach
Jejunum
Middle part of small intestine
Ileum
Third portion of small intestine
Colon
Long, coiled tubelike organ that removes water from digested foods
Pancreas (Digestive)
Large gland behind the stomach that secretes digestive enzymes into the duodenum
Liver
Large lobed glandular organ in the abdomen of vertebrates
Mucosa
Mucous membrane
Submucosa
Layer of areolar tissue beneath mucosa
Muscularis Externa
Region of muscle adjacent to submucosa
Responsible for peristalsis
Serosa
Tissue of serous membrane
Acinar Cells
Cluster of cells that resemble a “berry”
Produce pancreatic enzymes
Pancreatic Islet
Clusters of cells scattered throughout the pancreas that produce insulin
Liver Lobule
Unit of the liver consisting of masses of liver cells
Digestive Enzyme
Enzyme that breaks down polymeric macromolecules into building blocks
Chemical Digestion
Digestion using enzymes
Emulsification
The breakdown of fat globules in duodenum into tiny droplets
Bile
Bitter alkaline fluid that aids in digestion
Salivary Amylase
Source: Salivary glands
Function: Begins starch digestion in the mouth
Pepsin
Source: Stomach
Convertion: Converted from pepsinogen by HCl
Function: Digests proteins to shorter peptide chains, which then pass to the small intestine to complete digestion
Trypsin
Source: Pancreas
Convertion: Converted from trypsinogen by enterokinase
Function: Digests proteins
Pancreatic Lipase
Source: Pancreas
Function: Digests fat
Brush Border Enzymes
Source: Small intestine
Function: Carry out some of the final stages of chemical digestion
Endocrine Organ
Glands of the endocrine system that secrete hormones directly into the blood
Hormone
Regulatory substance transported in tissue fluids to stimulate specific cells
Target Tissue
Tissue or organ that is affected by a hormone
Negative Feedback
Counteraction of an effect by its own influence
Hypothalamus
Region of the forebrain below the thalamus that coordinates autonomic nervous system and pituitary