Digestive System Flashcards
What are the 12 teeth used for mashing and grinding?
Molars
What are the 8 teeth used for mashing and tearing?
Premolars
What are the 4 teeth used for tearing?
Canines
What are the 8 teeth used for cutting?
Insisors
How many total teeth do adults have?
32
How many baby teeth do we have?
20
Where is the crown located?
Above the gumline
Where is the root located?
Below the gumline
What is enamel made out of?
calicum
What is dentin?
soft bone
What is pulp?
Marrow-like structure
What does the root canal hold?
nerves and blood vessels
What is the hard palate used for?
Mashing food
What is the soft palate used for?
swallowing
What are the two functions of the tongue?
Taste
Creating food boluses
What are the 5 basic taste sensations?
Sour, Sweet, Salty, Bitter, umami
What do the salivary glands do?
Contains enzyme amalyse for starch digestion
What are the 3 salivary glands?
Parotid, sublinguial, Submandibular
What are the three stages of swallowing?
Voluntary, pharyngeal, and esophageal
What is peristalsis?
Involuntary movement of the smooth muscle which moves food through the digestive system
What are rugae?
Folds in stomach
What is contained on the inner layer of the stomach?
Mucosa-digestive enzymes
What is located in the middle layer of the stomach?
Sub-mucosal blood vessels
Where is the pyloric sphincter?
Between the stomach and small intestine
What organ filters the blood, removing toxins and ammonia?
Liver
What does the liver store?
vitamins and glycogen
How does the liver relate to the gall bladder?
Secretes bile to gall bladder
What does bile do?
Emulsifies fats in duodenum
What is the accepted age of the earth?
4.5 billion years
What does the liver do in regards to substances?
Turns hydrophobic substances to hydrophilic substances
What is a universal digestive gland that secretes digestive enzymes for all nutrient molecules?
Pancreas
What does the pancreas do in regards to PH?
Secretes bicarbonate ions to neutralize stomach acids in the small intestine
Where is the main site of nutrient absorption?
Small intestine
What is the length of the small intestine?
12 ft
What are the 3 sections of the small intestine?
Duodenum, jejunum, ileum
What is the lumen of the small intestine filed with?
Vili
What is the primary function of the large intestine?
Water reabsorption
How are wastes compacted?
When water is reabsorbed by the small intestine, the waste is concentrated and compacted
What does the bacteria in the large intestine create?
Vitamin K
What are the 6 structures of the large intestine?
Cecum Ascending colon Transverse colon Descending colon Sigmoid colon Rectume
What forms the bulk of the human diet?
Carbohydrates
What kind of carbs are healthy?
Complex (Branched)
What reduces colon cancer?
Fiber
What are the building blocks of protiens?
Amino acids
Why are lipids important in regards to phospholipids?
Linoleic acid is needed for phospholipids
What are the fat soluble vitamins?
Vitamin- K A D E
What are the water soluble vitamins?
Vitamins B and C
What do vitamins C and E do?
Fight free radicals
What are the 3 main eating disorders?
Obesity, Bulimia, Anorexia