Digestive System Flashcards

1
Q

Four Principal Layers of the GI tract:

A

Mucosa/mucous membrane

Submucosa

Muscularis / Muscularis externa

Serosa

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2
Q

Mucosa/mucous membrane

A

muscularis mucosa

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3
Q

Submucosa

A

ubmucosal nerve plexus / meissner’s nerve plexus

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4
Q

Muscularis / Muscularis externa

A

myenteric nerve plexus / auerbach’s nerve plexus

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5
Q

Serosa

A

mesothelium

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5
Q

columnar all over,
except in the esophagus
and the lower part of
anal canal where it is
stratified squamous.

A

EPITHELIUM

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6
Q
  • Made up of collagen and reticular fibers.
  • contain blood capillaries, lymph vessels and nerves
  • In SI, the core of villus is attached to the lamina propria.
  • Prominent aggregation of lymphatic tissue is seen in Lamina propria
A

LAMINA PROPRIA

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6
Q

At numerous places
epithelium dips into the
Lamina propria and form
crypts (Simple tubular glands).

A

Crypts

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7
Q
  • Contraction of Muscularis
    Mucosa is important for the local
    mixing of intestinal contents
  • It changes the shape of mucosa,
    that helps in absorption and
    secretion
A

MUSCULARIS MUCOSAE

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8
Q

2 LAYER OF MUSCULARIS MUCOSAE

A

Inner layer
Outer layer

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8
Q

MUSCULARIS MUCOSAE
Inner layer _____
Outer layer _____

A

Circular
Longitudinal

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9
Q

The Digestive System
7 Digestive Tract

A

 Oral cavity
 Mouth
 Esophagus
 Stomach
 Small Intestine
 Large Intestine
 Rectum
 Anus

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9
Q

The Digestive System 4 Glands of the Digestive
system

A

 Salivary Glands
 Liver Glands
 Pancreas
 Gall bladder

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10
Q

A mass of striated muscle covered by
mucous membrane whose structure varies according
to the region

A

Tongue

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11
Q

4 types of papillae

A
  1. Filiform papillae
  2. Fungiform papillae
  3. Foliate papillae
  4. Circumvallate papillae
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12
Q

is both exocrine and endocrine organ that digest
food and secrete hormones; its main function is to continue
the digestion of CHO initiated in the mouth.

A

Stomach

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12
Q

32 permanent teeth

A

( 2 incisor; 1 canine; 2 premolars and
3 molars/quadrant); 20 deciduous teeth;

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13
Q

3 parts of the stomach

A
  1. Cardia
  2. Fundus/ Body
  3. Pylorus
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14
Q
  • Epithelial lining at
    the cardio-esophageal
    junction
  • changes from
    stratified sq. to
    simple columnar
  • Mucous surface cells
    and cardiac glands
A

Mucosa

15
Q

Consists of blood vessels, lymphatic vessels and Meissner’s
plexus.

A

SUBMUCOSA

16
Q

3 Muscularis externa

A

Inner – Oblique
Middle – circular
Outer – longitudinal

17
Q

Outermost layers of the stomach which consists of loose
connective tissue

A

Serosa

18
Q

Inner –
Middle –
Outer –

A

Oblique
circular
longitudinal

19
Q

Lining Epithelium –
Simple columnar,
invaginates to various
extents into the lamina
propria, forming _____

A

gastric
pits.

20
Q

Secretes HCL and intrinsic factor

A

Parietal or oxyntic cells

21
Q

Secrete pepsinogen which is
converted into pepsin in an acid environment

A

Chief or zymogenic cells

21
Q

Produces soluble mucus

A

Mucous neck cells

22
Q

is the site of terminal food digestion,
metabolic absorption and endocrine secretion.

A

 Small intestines

22
Q

Small tubular fundic/gastric glands are present.

A

Lamina Propria

23
Q

: Secretes serotonin,
histamine and gastrin

A

Enteroendocrine and APUD cells

24
Q

3 segments of Small intestines

A

enum; Jejunum;Ileum

25
Q

Small Intestines 3 Mucous membrane

A
  1. Plicae Circulares/Kerckring’s Valve
  2. Intestinal villi
  3. Glands of Lieberkuhn/ crypts/ intestinal glands
26
Q

4 Cells found in the
small intestines

A
  1. Absorptive cells (Enterocytes)
  2. Goblet cells
  3. Paneth cells
  4. M cells/ membranous epithelial cells
27
Q

rich in lymphoid cells and nodules

A

Lamina propia –

28
Q

longitudinal and circular strands

A

Muscularis

29
Q

–small pendolous protuberances
composed of adipose tissues in the serous layer of the
intraperitoneal part of large intestines

A

Appendices epiplocae

29
Q

3 thick longitudinal bands of the outer
layer

A

Taenia coli

30
Q

series of longitudinal
folds in the mucous membrane of the anal region

A

Rectal columns of Morgagni

31
Q

Anal Canal 3 Epithelium

A

upper part-simple columnar
middle part-stratified squamous non-keratinized
lower part-covered by true skin

32
Q

Small mucosal folds between the anal columns ____

A

-Pectinate
line.

32
Q

upper part-
middle part-
lower part-

A

simple columnar
stratified squamous non-keratinized
covered by true skin

33
Q

Muscularis externa- circular muscle forms involuntary
_________

A

internal anal sphincter.

34
Q

*Produce digestive enzymes that acts in the small intestines
*Secretes hormones insulin and glucagon into the blood
stream

A

Pancreas

34
Q

*Absorbs water from the bile and stores the bile in
concentrated form

A

Gall bladder

34
Q

*Wet and lubricate the oral cavity and its contents
*Initiates digestion of CHO
*Secrete substances such as IgA, lysozymes and lactoferrin

A

Saliva ry Glands

35
Q

*Produce bile – digestion of fat
*Plays a role in the lipid, CHO and CHON metabolism
*Inactivates and metabolizes many toxic substances and
drugs
*Iron metabolism
*Synthesis of blood protein and factors necessary for blood
coagulation

A

Liver Glands