A&P 3.13. digestive system Flashcards Preview

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Flashcards in A&P 3.13. digestive system Deck (29):
1

PERONEUS tertius

A, I, O

Proximal: distal 1/3 of fibula

Distal attachment: base of 5th metatarsal bone

Action: assists dorsiflexion and eversion of foot

FIBULARIS

2

Anterior compartment

4 muscles

Tibialis anterior
Extensor hallicis longus
Extensor digitorum longus
PERONEUS tertius

3

Supinator

A, I, O

Proximal attachment : lateral epicondyle of the humerus and proximal ridge of the ulna

Proximal attachment: proximal anterior and lateral surface of the radius

Action: supinates forearm

4

Digestion

Defined

Breaking food down into particles small enough to be used by cells
Both mechanical (mastication, churning of digestive tract) and chemical (bile) digestion

5

Absorption

Transfer of particles (nutrients) into the blood stream

6

Digestive tract structures

GI tract or alimentary canal
Long tube that starts from the mouth and ends at anus

7

Accessory organs

Assist in both mechanical (younger and teeth) and chemical digestion

8

Wall of the GI tract

4 layers

Mucosa
Sub mucosa
Muscular is
Serosa

FROM INSIDE OUT

9

Mucosa

Inner lining
Mucous membrane
Simple squamous epithelial tissue
Indirect contact with contents of GI tract
Contains lamina properia and muscular is mucosae

10

Parts of mucosa

Epithelium
Lamina properia
Muscularis mucosae - thin layer of smooth muscle

11

Submucosa

Areolar connective tissue that binds the mucosa layer to the muscular is layer containing many blood and lymphatic vessels

12

Muscularis

Thick layer of smooth muscle, and has two layers
Inner sheet of circular fibers
Outer sheet of longitudinal fibers

13

Serosa

Outer layer
Part of the visceral peritoneum
Outermost layer of the GI tract below the diaphragm
Simple squamous epithelium and areolar connective tissue
Secretes serous or peritoneal fluid
Allows GI tract to glide easily against other organs

14

Segment of the GI tract

Mouth
Oropharynx
Esophagus
Stomach
Small intestine
Large intestine

15

Appendix

Attached to the cecum but is more part of the lymphatic system

16

Small intestine portions

Duodenum - most enzymes secreted for digestion
Jejunum
Ileum

17

Large intestine

Cecum
colon (ascending, transverse, descending, sigmoid)
Rectum
Anus

18

Accessory structures

5

Teeth & tongue
Salivary glands
Pancreas
Liver
Gall bladder

19

Teeth and tongue

Mechanically begin the process of digestion by breaking down of food/nutrients in the mouth

20

Deglutition

Swallowing

21

Mouth

Oral or buccal cavity

22

Salivary glands

Release saliva that contains amylase

Parotid
Submandibular
Sublingual

23

Amylase

Enzyme that digests carbohydrates only

24

Parotid glands

In the cheek

25

Submandibular

Under the jaw

26

Sublingual

Under the tongue

27

Pancreas

Has both endocrine and exocrine function
Digestive function is to secrete a variety of enzymes (pancreatic juices) into the small intestine and hormones (endocrine - insulin and glucagon) into the blood

28

Liver

Secretes bile into the small intestine and gallbladder

29

Gall bladder

Holds bile to be secreted as needed