digestive system Flashcards

1
Q

what is the digestive system made up of

A

Alimentary Canal (GI tract):
tube extending from mouth to anus
includes the mouth, pharynx, esophagus, stomach, small & large intestine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

DIGESTIVE SYSTEM FUNCTION

A
  1. Digestion: process of physically/chemically breaking food into nutrients for the cells”
  2. Eliminate solid wastes from the body
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

6 BASIC PROCESSES IN DIGESTION ISMDAD

A

Ingestion
Secretion
Mixing and propulsion
Digestion - mechanical and chemical
Absorption
Defecation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

1 BIG STEP OF DIGESTIVE PROCESS

A
  1. Food enters mouth
    Broken down by teeth
    taste w taste buds
    saliva secrets from salivary glands moistens food & starts chemical digestion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

2 BIG STEP OF DIGESTIVE PROCESS

A
  1. Food formed into bolus
    pushed into pharynx by tongue (swallowed)
    muscles of pharynx push bolus into esophagus
    food travel through esophagus to stomach by peristalsis by muscles of esophagus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

3 BIG STEP OF DIGESTIVE PROCESS

A
  1. Food broken down into smaller pieces in stomach physically by churning by muscular action of stomach
    chemically by gastric juices (acid) secreted by stomach lining
    Semi-liquid chyme is formed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

4 BIG STEP OF DIGESTIVE PROCESS

A
  1. Peristalsis pushes
    food from stomach into
    small intestine
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

5 BIG STEP OF DIGESTIVE PROCESS

A

Remaining chyme, undigested nutrients, and waste move into colon (large bowel, large intestine)
ascending, transverse, descending colon
most of the water & electrolytes is absorbed from chyme
remaining waste products of digestion called feces
includes solid wastes, some water, micro-organisms, and mucus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

6 BIG STEP OF DIGESTIVE PROCESS

A
  1. Peristalsis will push the feces from the colon to the rectum
    stores feces until defecation (BM)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

7 BIG STEP OF DIGESTIVE PROCESS

A
  1. Feces will leave body through the
    anus
    opening to outside
    anal sphincter (muscle ring)
    feces excreted is called stool
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

2 SPHINCTERS

A

Lower Esophageal Sphincter (LES)
prevents food coming back from stomach into esophagus.
Pyloric Sphincter
between stomach and small intestines -controls how much food goes into stomach.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

SMALL
INTESTINE

A

Lined with villi
3 parts of the small intestine:
1. Duodenum
digestive juices (bile & pancreatic enzymes) added to chyme to help chemically break food down further
2. Jejunum
3. Ileum
Most absorption of nutrients happens in jejunum and ileum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Functions of the Liver

A
  1. Metabolizes (breaks down) fats, proteins, and carbohydrates
  2. Detoxifies blood
  3. Stores fat-soluble vitamins
  4. Produces bile, cholesterol, and bilirubin
    Bile helps digest fat, absorb fat-soluble vitamins, and gives stool brown color
    Bile stored in gall bladder until needed for digestion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Function of the Pancreas

A

Adds other digestive juices
Insulin is produced by beta cells
Pancreas also produces:
amylase, break down of carbohydrates
Lipase, break down of fats
Proteases, breaks down protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

NORMAL CHANGES WITH AGING IN DIGESTIVE SYSTEM

A

Decrease in saliva production
Difficulty swallowing
Decrease in appetite
Decrease in secretion of digestive juices
Ingestion
Peristalsis slows, constipation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what to observe in digestive system

A

appetite
ability to chew and swallow (related to CNS)
pain/dyspepsia
emesis
bloating
bowel sounds (sounds as peristalsis occurs)
BM – frequency, amount, shape/consistency, colour, odour
report changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Characteristics of Normal Stool

A

Brown in colour
Soft formed (shaped like rectum); moist
Affected by hydration
Affected by speed of movement through GI tract
Characteristic odor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Characteristics of Abnormal Stool

A

Bright red, fresh blood (lower bowel)
Black, tarry stool, older blood (may be from higher in GI system)
Colour may be due to foods/medications
Clay coloured: indicates liver disease
Infections/ pathogens may cause other colours e.g. greenish

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Diarrhea

A

Frequent liquid stools
S/S: abdo cramping, n&v, dehydration
Causes: infections, medications, food, etc.
TX: diet, medications (must be done with nurse supervision)

20
Q

Diarrhea – HCA Role

A

Encourage hydration
Follow standard precautions
Skin care
Help clients to bathroom promptly
Consider safety
Observe and report
Document

21
Q

Fecal
Incontinence

A

Inability to control passage of feces and gas through anus
Many causes:
intestinal or nervous system disease
diarrhea
medications
delayed help in getting to the bedpan, commode, BR

22
Q

HCA role in Fecal Incontinence

A

Promote normal defecation
Assist client to toilet as requested
May need a bowel training plan

23
Q

Bowel Training

A

Process of developing a regular pattern of defecation
Two goals:
To gain control of bowel movement
To prevent fecal impaction, constipation, fecal incontinence

24
Q

Bowel Training hca role

A

Toilet client as per care plan or when client requests to have BM
Follow guidelines to promote normal defecation
Privacy
safety
positioning
Suppository may be given to stimulate a BM (check scope)

25
Constipation
Condition where BMs are less frequent; stool is hard, dry Feces moving slowly through colon S/S: increased flatus abdo pain bloating decreased appetite may lead to hemorrhoids If severe, may experience nausea/vomitting
26
Constipation causes
low fiber diet decreased fluid intake inactivity, immobility some meds and diseases ignoring the urge to defecate, or not having requests for toilet acted upon
27
Constipation – HCA Role
Prevention Encouraging activity Encouraging fluids (if permitted) Encouraging fiber in diet Suppository or enema (delegated task)
28
Irritable Bowel Syndrome
2 types: 1. IBS with diarrhea S/S: abdo bloating; urgency, frequent, loose BMs (sometimes contain mucus) 2. IBS with constipation S/S: abdo bloating; straining during BMs; hard, lumpy BMs; abdominal pain (relieved after having a BM) Cause unknown stress can trigger TX: medications, dietary changes
29
IBS – HCA Role
Assist with diet Record output as necessary Observe and report symptoms Skin care PRN Compassion and patience
30
Colitis
Inflammation of the colon S/S: fever pain abdo tenderness rectal bleeding ulcers in colon TX: antibiotics anti-inflammatories surgery
31
Crohn’s Disease
Chronic, inflammatory bowel condition Episodic Exact cause unknown; no cure May affect any part of the GI tract; mostly lower small intestine/colon
32
s/s of crohn's diease
specific to part of bowel affected Most common: diarrhea abdo pain weight loss Can also be systemic: skin rashes arthritis, eye inflammation anemia mouth ulcers
33
hca role in crohn's diease
reporting all observations including client’s symptoms recording all BMs (any blood?) reporting changes in appetite or dietary intake provide support and empathy
34
Ostomy
surgical creation of a stoma (artificial opening in the body) Part of intestines may be removed surgically for many reasons (disease, cancer, trauma) May be permanent or temporary some cases, ostomy can be reversed 2 types
35
Colostomy
part of the colon is brought out onto abdo wall lower on GI tract, BMs more formed (similar to normal BM)
36
Ileostomy
part of the ileum is brought out onto abdo wall higher up the GI tract, BMs more frequent, less formed as less water is absorbed
37
emesis
vomitting act of expelling contents of stomach through mouth Severity varies when client vomits: if lying down, turn client’s head to side Get a basin to catch the emesis After care: clean gown/area perform oral care Observe and report color, odor, amount, etc
38
Gastro-esophageal reflux disease (GERD)
Cause unknown Stomach acid goes up into the esophagus s/s: most common heartburn sour taste bad breath burping dysphagia TX: medications positioning
39
Celiac Disease
Disorder results in inability to tolerate gluten wheat, oats, barley S/S: abdo distention emesis diarrhea (usually pale in color) muscle wasting TX: no gluten in diet
40
Gallbladder Disease
def: Sac that stores bile Cholecystitis: Stones form in gallbladder and cause inflammation Stones may prevent bile going into digestive system S/S: severe abdo pain nause & vomiting (n&v) jaundice TX: surgery diet changes
41
Liver Disease: Hepatitis
caused by: infection (viral, bacterial, parasitic) alcohol or drug use toxins mismatch during blood transfusion
42
Liver Disease: Cirrhosis
Occurs from chronic or persistent liver disease Scar tissue replaces healthy liver tissue liver function impaired Causes: alcoholism (most common) No cure treatment can prevent more damage S/S: jaundice enlarged liver ascites fatigue
43
Accessory organs of digestion
teeth, tongue, salivary glands, liver, gallbladder, pancreas
44
Chemical digestion
chemical breakdown of food into nutrient molecules for cells to use (stomach)
45
Mechanical digestion
physical breakdown of food into smaller pieces (chewing)
46
Hemorrhoids
Vascular structures in the anal canal that when swell cause the disease Pain and bleeding Cause unknown, risk factors are constipation, diarrhea, pregnancy, and sitting on the toilet for long Tx: increased fiber, fluids, rest, surgery