Gastrointestinal System Flashcards
Two parts of the digestive system
Digestive system proper
Accessory organs of digestion
Accessory organs of digestion:
- Salivary glands
- Biliary tree
- Liver
- Pancreas
- Gallbladder
Digestive system proper
- Oral cavity
- Stomach
- Pharynx
- Small intestines
- Esophagus \
- Large intestines
T or F
The digestive system proper is 127 cm long and is composed of cartilage
FASLE
Long (823 cm), fibromuscular tube
6 Basic Processes in GI
- ingestion of food (mouth)
- movement of food (peristalsis)
- mechanical preparation of food (chewing)
- chemical digestion
- absorption of food
- elimination of indigestible substances & wastes
(defecation)
From the lips to the junction of the mouth & pharynx
Oral Cavity
Upper & lower lips separated by the
Oral fissure
2 Areas of the oral cavity
- Vestibule
- Oral cavity proper
Slit-like space between lips and cheeks (ext.
boundary) & gums and teeth (int. boundary)
Oral Vestibule
space behind each 3rd molar tooth
Retromolar space
T or F
l Communication between vestibule & oral cavity
proper when jaws are closed
TRUE
divide vestibule & oral cavity proper
Teeth
2 Parts of the teeth
crown
root
embedded portion of the teeth
- fits into alveolar processes of jaws & covered by gingiva
root
exposed part of the teeth
covered by enamel
crown
Functions:
1. incisors –
2. canines –
3. molars -
Functions:
1. incisors – cutting
2. canines – grasping
3. molars - grinding
– begins to appear at 6 mos. & complete at 2 yrs.
l Lost at 6th – 13th yr. of life
Deciduous/Milk/Temporary teeth
begin to erupt at 6 yrs.
l Last tooth to erupt: 3rd molar or Wisdom tooth (appear between the 17th – 30th yr. of life)
Ø Permanent teeth
mobile, muscular organ covered w/ mucous membrane
Tongue
The tongue is located at Ant. 2/3 – oral cav. & Post. 1/3 – pharynx
Divided by an inverted V-shaped depression: called?
Ant. 2/3 – oral cav.
Post. 1/3 – pharynx
Divided by an inverted
V-shaped depression:
Sulcus terminalis
midline fold of mucous membrane; attach tongue
to floor of mouth
Frenulum of the tongue
3 Types of Papillae [human]
(ant. 2/3 of tongue):
- Filiform
- Fungiform
- Circum(vallate)
