topic 25

Question 1

coronaries to show from facies auricularis

Answer 1

1. a. coronaria sinistra( valvula semilunaris sin - big hole)
2. r. interventricularis paraconalis
3. circumflexus
4. r. intermedius
   - blood flow going caud and dist
5. v. cordis magna (paraconal sulcus)
6. r. intermedius
   - blood floweing caud and prox

Question 2

coronaries to show from f. atrialis

Answer 2

1. coronaria dex (valvula semil. dex - small hole)
   - –> TERMINATE cran to subsinosal sulcus!! blood flowing caud in sulcus coronarius
2. coronaria sin
3. r. intermedius
4. r. interventr subsinosus
   - blood flowing cranial and distal
5. v. cordis media (in subsinosal groove)
   - blood flow prox to sinus coronarius
6. vv. cordis dextra - singular veins terminating in r. atrium
   (3. v. cordis magna and r. intermedius)

Question 3

where is the venous blood of the coronary vein drained into(except vv. cordis dextra)

Answer 3

sinus coronarius -> R atrium

Question 4

apex and basis cordis point which directions

Answer 4

basis cordis: cran/dors (hilus of heart)

apex cordis: caud/ventr

Question 5

what does the sulcus coronarius mark, and where is it interrupted

Answer 5

atrium from ventricles - tr. pulmn

Question 6

what are the only arteries with de-oxygenated blood

Answer 6

arteries of lungs; aa. pulmonales

Question 7

lig arteriosum

Answer 7

btw aorta and tr. pulm

Question 8

sinus transversum

Answer 8

btw aorta/tr pulm and atrium: for movement during cat\rdiac activity

Question 9

sinus obliqus pericardi

Answer 9

space/pouch btw R/L pulm. veins and L atrium

-> fac aur: left/caudal under tr. pulmn

Question 10

ligament attaching heart to sternum

Answer 10

lig phrenicopericarium

Question 11

structures to show in atrum dexter

Answer 11

• main chamber is the sinus venarium cavarium
• tuberculum intervenosum
• fossa ovalis
• mm. pectinati inside R auricle

Openings:

• ostium vena cava caudalis: valvula v. cavae caud
• Sinus coronarius: valvula sinus coronarii
• Ostium vena cavae cranialis: valcula v. cava cran
• Ostium atrioventriculare dexter
• —>Large opening from right atrium to right ventricle

Question 12

structures to show in ventriculus dexter

Answer 12

thin wall - smallest ventricle
1 - trabecula septomarginalis (dex only)
2 - mm. papillares

Question 13

what are the papillary mm of right ventricle and their corresponding valve

Answer 13

1 - Magnus: biggest, in the middle, cusp P + A
2 - parvi: small, multiple, distal, cusp P+S
3 - subarteriosus, most prox,cusp S+A

Question 14

structures to show in ventriculus sinistra

Answer 14

1 - subatrialis - under atrium

2 - auricularis - under auricle(Sin)

Question 15

which valve of the aortic semilunar valva have no hole for the coronaries

Answer 15

valvula septalis

Question 16

what are the valves of tr. pulm

Answer 16

R/L/I

intermed is most parietal

Question 17

the angular valve of the right atriventricular valve point in which direction

Answer 17

cranial(a bit towards fac. auricularis)

Question 18

mm. pectinati originate where

Answer 18

crista terminalis

Question 19

what are the fibromuscular chords btw mm. papillares and AV valves

Answer 19

chordae tendinae

Question 20

strucures found on walls inside heart

Answer 20

trabecula cordis (trabecula carneae)
- decrease turbulent blood flow