Heart Dissection

Question 1

The wide region of the heart indicated by the color blue is the _____

The narrow region of the heart indicated by the color red is the _____

Answer 1

base

• where the great vessels enter

apex

• narrow tip

Question 2

The structure surrounding the heart is the _____

Answer 2

pericardium

• protective tissue surrounding the heart

Question 3

The shiny serous layer indicated by the metal probe is the _____

Answer 3

parietal pericardium

• part of the serous layer, in contact with the fibrous pericardium

Question 4

The shiny serous layer on the surface of the heart is called the _____

Answer 4

epicardium

• the outermost layer of the heart wall, made up of squamous epithelium, connective tissue and fat

Question 5

The green chamber is the _____

The orange chamber is the _____

Answer 5

right ventricle

• pumps blood to the pulmonary circuit through the pulmonary truck

left ventricle

• pumps blood to the systemic circuit through the aorta

Question 6

The red structure is the _____

Answer 6

right auricle

• earlike projections that exten anteriorly from each atrium

Question 7

The purple structure is the _____

Answer 7

left auricle

• earlike projections that extend anteriorly from each atrium

Question 8

The blue vessel is the _____

The orange vessel is the _____

Answer 8

superior vena cava

• returns blood from the head, upper limbs and thorax to the right atrium

inferior vena cava

• returns blood from the abdomen, pelvis and lower limbs to the right atrium

Question 9

Name the green chamber.

Answer 9

right atrium

• receives deoxygenated blood from the superior and inferior vena cavae

Question 10

Name the orange vessel that drains into this chamber.

Answer 10

coronary sinus

• (and cardiac veins) return blood from the heart tissues to the right atrium

Question 11

Name the red wall between the chambers.

Answer 11

interatrial septum

• functions to keep oxygenated and deoxygenated blood separate

Question 12

Name the green valve.

Answer 12

tricuspid valve

• located between the right atrium and right ventricle, prevent the flowing back in the atria when the hear is contracted

Question 13

The blue structures are the ____

which are attached to the orange muscle called_____

Answer 13

chordae tendinae

• fibrous attachments to the ventricular side of the AV valves which anchor the valves to the papillary muscle

papillary muscle

• chordae tendinae attachment point to prevent AV valves from inverting

Question 14

The purple chamber is the _____

Answer 14

right ventricle

• pumps blood to the pulmonary circuit through the pulmonary trunk

Question 15

Name the orange structure stretching across this chamber.

Answer 15

moderator band

• muscular band of heart tissue spanning the right ventricle, short cut for electrical conduction across the ventricle

Question 16

Name the shiny, inner layer indicated by the metal probe.

Answer 16

endocardium

• smooth inner layer of the heart wall; simple squamous epithelium reduces friction as blood flows through the heart

Question 17

Name the red tissue layer.

Answer 17

myocardium

• middle layer composed of cardiac muscle which provides the force that propels blood through the heart

Question 18

Name the orange valve.

Answer 18

pulmonary semilunar valve

• between the right ventricle and pulmonary trunk

Question 19

The orange vessel is the _____

Answer 19

pulmonary trunk

• drains the right ventricle; divides to form left and right pulmonary arteries which deliver deoxygenated blood to the lungs

Question 20

The green and blue vessels both branch off the orange vessel.

The green vessel is the _____

The blue vessel is the _____

Answer 20

right pulmonary artery

• deliver deoxygenated blood to the lungs

left pulmonary artery

• deliver deoxygenated blood to the lungs

Question 21

Name the orange chamber.

Answer 21

left atrium

• receives oxygenated blood from the pulmonary veins

Question 22

Name the green valve.

Answer 22

mitral (bicuspid) valve

• located between the left atrium and left ventricle

Question 23

Name the blue chamber.

Answer 23

left ventricle

• chamber pumps blood to the systemic circuit through the aorta

Question 24

The yellow wall between the chambers is the _____

Answer 24

interventricular septum

• separates the ventricles from each other

Question 25

Name the orange valve.

Answer 25

aortic semilunar valve

• between the left ventricle and the aorta

Question 26

The large purple vessel is the _____

Answer 26

ascending aorta

• drains the left ventricle and returns blood to the body and to the coronary circuit of the heart

Question 27

The red opening in the purple vessel leads to a vessel called the _____

Answer 27

coronary artery

• originate from the beginning of the aorta and are responsible for delivering blood to the myocardium