Digestive System Part 1 Flashcards
Name the 5 functions of the digestive system
- Ingest Food
- Break Large Particles into smaller ones
- Secrete enzymes that decompose food molecules
- Absorb products from above functions
- Eliminate unused residues
What is another name for the digestive tract
Alimentary Canal
How long is the alimentary canal
9 meters
List the 6 organs of the digestive tract
- Mouth
- Pharynx
- Esophagus
- Stomach
- Small intestine
- Large intestine
How many layers does the alimentary canal or digestive tract consist of
4
Name the 4 layers that make up the alimentary canal/digestive tract
- mucous membrane
- submucosa
- muscular
- serous or serosa
Name the 2 types of movement in the digestive tract
- mixing
2. propelling
What is the other name for propelling movements
peristalsis
what type of contractions make up the mixing movement
rhythmic
what type of motion make up the propelling movements
wavelike
What is the function of the accessory organs
release secretions into the canal
What are the four organs of the accessory organs
- salivary glands
- liver
- gall bladder
- pancreas
What is the function of the mouth
receive and prepare food for digestion
what 4 things is the mouth surrounded by?
- lips
- cheeks
- tongue
- palate
What is the chamber between the tongue and palate
oral cavity
What is the narrow space between the teeth, cheeks and lips
vestibule
What type of tissue lines the cheeks?
epithelial tissue
Why are the lips red
there is an abundance of red blood cells near the surface
what is the membranous fold of the tongue called
frenulum
what type of muscle makes up the tongue
skeletal muscle
what does the tongue aid in
mixing and moving food
what are the rough projections on the tongue that provide friction?
papillae
the root of the tongue is anchored to what
hyoid bone
there are two parts to the palate, name them
- hard (anterior part)
2. soft (posterior part)
what is the purpose of the uvula in the palate
block of nasal cavity when swallowing
Name the three sets of tonsils
- lingual
- palatine
- pharyngeal
Which of the three tonsils is a common site for infection
palatine
which tonsil helps protect against infection
lymphatic
How many different sets of teeth does one develop
two
What are the two other names for the first set of teeth developed
primary and decidous
How many teeth make up the first set
20
When do the first set of teeth appear
6 months- 2.5 years
In what order do the first set of teeth shed
in the same as they appear
What is reabsorbed from the first set to push out the second set of teeth
roots
what are the two other names for the second set of teeth
secondary or permanent
How many teeth make up the second set
32
When do the second set of teeth come in
age six until 3rd molars come in at age 17-25
What are the front 4 top and bottom teeth called
incisors
what re the cone shaped teeth beside the incisors
cuspids or canine teeth
what is another name for the 3rd molars
wisdom teeth
what is the hardest substance in the body
white enamel
what is the part of the tooth that shows
crown
where do the crown and root of a tooth meet
neck of the tooth
what are the teeth anchored to
alveolar bone
what covers the crown of the teeth
white enamel
What makes up the bulk of the tooth
dentin
what does the pulp cavity contain
blood vessels, nerves, connective tissue
what is the bonelike material that encloses the root called
cementum
what surrounds the cementum
periodontal ligament
