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Flashcards in Viscera Deck (35):
1

What do hollow viscera comprise of

Lumen
Mucosa
Muscularis
Serosa

2

Lumen

Dialates and constricts

3

What is the lumen NB for

Regulation of material going through

4

What tends to occur in lumen

Calculi tend to get lodged --> i.e stones

5

Describe serosa

V. thin lining of cells which produce fluid to minimise friction

6

What is serosa derived from

Lining of body cavities

7

Mesentry

A double lining the attaches the body wall to viscera

8

Describe muscularis

Smooth muscle --> either circular or longitudinal

9

What does muscularis allow for

Motility
Expansion
Storage

10

Describe mucosa

Tons of fold that increase surface area for absorption

11

Solid viscera

Have glands --> either secretory or excretory
Internal compartment with connective tissue
Have serosa

12

Exocrine glands

Secrete liquid into a duct
open into HOLLOW viscera

13

Eg of exocrine glands

Liver and bile duct

14

Hilum

Duct of a hollow viscera through which an exocrine gland enters

15

Endocrine glands

Secrete directly into blood stream
Secrete hormones that act on other parts of the body
Rich blood supply

16

Describe an organ that is both endocrine and exocrine

Pancreas
Island cells = endo --> glucose metabolism
Ducts = exocrine -->? enzymes

17

Difference between endo and exocrine glands

Exo --> into a duct endo --> blood stream
Exo --> acts at a site close by endo --> far away site
Exo --> not a rich blood supply, exo --> rich

18

Sphincters

Localised muscle thickness
Found at end

19

Two types of sphincters

Anatomical
Functional

20

Anatomical sphincter

Smooth muscle thickening
Distal ends of ducts
Control passage and prevent reflux

21

Functional sphincter

NO muscle thickening
Just a mechnism

22

What are anatomical sphincters divided into

Voluntary and involuntary

23

What type of muscle is voluntary sphincter derived from

Skeletal

24

What type of muscle is involuntary muscle derived from

Smooth muscles --> ANS nerves --> first line of defence

25

What are serous membranes

Single membrane that lines a body cavity
Contains a space in between it --> serous fluid

26

What are the two types of serous membranes

Parietal and visceral

27

Difference b/w parietal and visceral serous membranes

Parietal --> lines body wall
Receives somatic blood and nerve supple

Visceral --> lines viscera
Same nerve and blood supply as viscera

28

What are parietal and visceral membranes joined by

Mesentry

29

Role of mesentry

Mobility of viscus into cavity
Blood and nerve supply to viscera

30

Peritoneal cavity

Closed cavity in the abdoment lined by serous membrane

31

Reffered pain

Pain perception in another area than where it is actually occuring. Pain is referred to local overlying skin where somatic nerve is involved

32

Paired viscera referred pain

Each viscera develop and are located on either side of the body
Therefore receive blood and nerve supply from either side of central axis --> therefore referred pain on same side as organ

33

Unpaired viscera

Develop in midline and migrate
Nere and blood supply is from both sides of spinal cord
Therefore referred pain is around the midline

34

What type of organ is likely to result in referred pain around the midline

Unpaired viscera

35

Draw serous membrane development

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