Thoracic Viscera Lab Flashcards Preview

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Flashcards in Thoracic Viscera Lab Deck (46)
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1

Heart location

lies between IC spaces 2 and 6; apex opposite last segment sternum and cr to sternal attachment diaphragm; distance apex to base usually 2/3 dorsoventral diameter of thorax

2

relationship of heart to ribs in thorax

medial

3

relationship of heart to lungs in thorax

ventro cd to cr lung lobe, ventro cr to cd lung lobe

4

relationship of heart to diaphragm in thorax

cr

5

relationship of heart to basal border of lung in thorax

cr

6

relationship of heart to cr vena cava in thorax

cd

7

PALT

Pulmonary valave- L side low 3rd IC space
Aortic valve- L side high 4th IC space just below horizontal line through shoulder jt
Left AV valve- L side low 5th IC space; caudodorsal to olecranon
Right AV valve (tricuspid)- R side low in 3rd or 4th IC space

8

cardiac notch

divides cr and cd lobes bilaterally; in theory cardiac notch provides access to heart that does not require piercing lungs so in theory go through L side bc L side larger and no accessory lobe

9

L cardiac notch

between 3rd and 6th ribs

10

R cardiac notch

between 3rd rib and 4th IC space

11

accessory lobe

On r lung, wraps around cd VC

12

course of the blood supply as it enters the heart, circulates to the lungs, and then is pumped to
the systemic circulation

Cr or Cd VC -> RA -> R AV valve -> RV -> pulomary artery -> lungs -> pulmonary vein -> LA -> L AV valve -> LV -> aorta -> brachiocephalic trunk

13

intervenous tubercle

prevents blood from cr and cd VC draining back into heart from crashing into each other and beocming turbulent

14

branches brachiocephalic trunk

L subclavian, bicarotid trunk, R subclavian arteries

15

branches of subclavian artery

costocervical trunk, deep cervical trunk, vertebral artery, superficial cervical artery, internal thoracic artery

16

Cd vena cava relationship to aorta

cd vc v to aorta

17

pleura

parietal and visceral

18

parietal pleura

costal- lines ribs
diaphragmatic pleura
mediastinal pleura

19

visceral pleura

touches lungs

20

pleural recess

where parietal pleura directly applied to each other; cupula pleura and costodiaphragmatic recess

21

cupula pleura

on both sides in cr mediastinum where costal pleura reflects back to become mediastinal pleura; in horse this extends cr to 1st rib on R side

22

costodiaphragmetic recess

cd to basal border of lung where costal and diaphragmatic pleura rest against one another

23

parts of medaistinum

cr (area in front of heart), middle (at level of heart), and caudal (cd to heart, portion v to esophagus pushed over to L by accessory lobe)

24

cr mediastinum on R side contains

cr vena cava
costo cervical trunk
deep cervical artery
vertebral artery
azygous vein
phrenic nerve
trachea
vagus nerve
thymus (in young patients)
cr mediastinal LNs

25

cr mediastinum on L side contains

costocervical trunk
deep cervical artery
vertebral artery
phrenic nerve
vagus
thymus (In young patients)
cr mediastinal LNs
aortic arch
trachea
esophagus

26

middle mediastinum contains

thoracic duct
phrenic nerve
Vagus nerve
Symp trunk

27

cd mediastinum contains

aorta
esophagus
cd vc
d and v vagal trunks
phrenic nerve
azygous vein
throacic duct

28

horse mediastinum

fenestrated so pneumothorax more likely to be bilateral in horse

29

phrenic nerve origin to ternimation

- phrenic nerve originates at C5, C6, C7 passes caudoventrally over cr vc, the heart, and then ventral to lung root with cd vc then to diaphragm (on R)

- phrenic nerve originates at c5,c6,c7 then passes caudoventrally over base of heart, then ventral to lung root with cd vc, then to diaphragm (on L)

30

Sympathetic NS gangia

cr cervical ganglion
middle cervical ganglion
cervicothroacic ganlgion
symp trunk ganglion
cd mesenteric ganglion
pelivic ganglion