anatomy: heart

Created by kem1868 

Upgrade to
remove ads

113 terms

anterior
posterior=base
diaphragmatic surface

surfaces of heart

mediastinum

where the heart lies

suspends the heart; a double-layered sac of tough, fibrous connective tissue and mesothelium

pericardium

endocardium
myocardium
epicardium

layers of heart wall

endocardium

myocardium

epicardium

auricles

black arrows

coronary sulcus

blue/purple arrows

anterior interventricular sulcus

teal/green arrow

posterior interventricular sulcus

light green arrow

ascending aorta: oxygenated

carries oxygenated or deoxygenated blood?

aortic arch: oxygenated

carries oxygenated or deoxygenated blood?

brachiocephalic artery: oxygenated

carries oxygenated or deoxygenated blood?

left common carotid artery: oxygenated

carries oxygenated or deoxygenated blood?

common carotid artery: oxygenated

carries oxygenated or deoxygenated blood?

left subclavian artery: oxygenated

carries oxygenated or deoxygenated blood?

ligamentum arteriosum

superior vena cava: deoxygenated

carries oxygenated or deoxygenated blood?

inferior vena cava: deoxygenated

carries oxygenated or deoxygenated blood?

pulmonary trunk

pulmonary artery: deoxygenated

carries oxygenated or deoxygenated blood?

pulmonary veins: oxygenated

carries oxygenated or deoxygenated blood?

remnant of the ductus arteriosus, which shunts blood from pulmonary trunk to distal aortic arch in fetus

ligamentum arteriosum

ductus arteriosus function in fetus

allows blood to bypass fetus's fluid-filled lungs

coronary sinus

superior vena cava opening

inferior vena cava opening

pectinate muscles

features of right atrium

features (which chamber?):
superior vena cava opening
inferior vena cava opening
coronary sinus opening
pectinate muscle

features of left atrium

features (which chamber?):
pulmonary vein opening
pectinate muscles

features of right ventricle

features (which chamber?)
trabeculae carneae
papillary muscles
chordae tendinae
tricuspid valve
pulmonary semilunar valve
interventricular septum

features of left ventricle

features (which chamber?):
trabeculae carneae
papillary muscles
chordae tendinae
bicuspid valve
aortic semilunar valve

feature of interatrial septum

fossa ovalis

fossa ovalis

papillary muscles

usually pink not white

trabeculae carneae

red arrows

chordae tendineae

red arrows

bicuspid valve

tricuspid valve

pulmonary semilunar valve

aortic semilunar valve

interventricular septum

red arrows

function of fossa ovalis

prevents blood from flowing through interatrial septum, preventing deoxygenated and oxygenated blood from mixing

function of foramen ovale in fetal circulation

shunts highly oxygenated blood from right atrium to left atrium

closure of foramen ovale in heart

baby takes its first breath so lungs now oxygenate the blood; blood is no longer oxygenated at the placenta

SVC/IVC from body-->right atrium--> tricuspid valve-->right ventricle--> pulmonary semilunar valve-->pulmonary trunk-->pulmonary arteries-->lungs--> pulmonary veins-->heart-->left atrium-->bicuspid valve-->left ventricle-->aortic semilunar valve-->aorta-->body(systemic circuit)

SVC/IVC from body-->right atrium--> tricuspid valve-->right ventricle--> pulmonary semilunar valve-->pulmonary trunk-->pulmonary arteries-->lungs--> pulmonary veins-->heart-->left atrium-->bicuspid valve-->left ventricle-->aortic semilunar valve-->aorta-->body(systemic circuit)blood circulation(start with deoxygenated blood entering heart)

left atrium and left ventricle

bicuspid valve lies between...

right atrium and right ventricle

tricuspid valve lies between...

pull valves to keep them close, preventing both backflow of blood and the prolapse of valves in the heart

function of chordae tendineae and papillary muscles

blood pushes the cusps of the valves closed; the cusps open in the direction of blood flow so if blood moves the opposite way, the valves will close

closure of semilunar valves is due to..

coronary arteries

supply blood to the heart muscle itself

cardiac veins

carry deoxygenated blood from the heart; drain into coronary sinus then into right atrium

coronary sulcus holds...

coronary sinus

anterior interventricular groove holds...

right and left coronary arteries

posterior interventricular groove holds...

right coronary artery

SA node-->internodal fibers-->AV node -->AV bundle--> bundle branches--> purkinje fibers

conduction system of the heart

where the heart contracts first

apex

where depolarization happens first

SA node

purpose of slight delay in conduction at the AV node

allow ventricles to fill before contraction

positioning of purkinje fibers

travel down interventricular septum then turn superiorly to allow ventricles to start to contract at apex, ejecting blood up and out of the heart

conduction

are purkinje cells specialized more for conduction or contraction?

hormones(epinephrine), neural (ANS: parasympathetic via vagus nerve and sympathetic via cardiac nerves)

what controls heart rate?

internodal fibers

bundle branches

purkinje fibers

SA and AV nodes

Vagus nerve innervation in the heart

tunica intima-->tunica media--> tunica adventitia

layers of blood vessels (deep to superficial)

heart-->arteries-->arterioles--> capillaries-->venules-->veins-->heart

peripheral circulation closed double loop system

arterioles

control of regional blood flow and peripheral resistance

arteries

function in high pressure system

elastic
muscular
arterioles

3 types of arteries(from biggest to smallest)

broad and very elastic tunica media, tunica adventitia contains vasa vasorum

elastic artery features

small blood vessels that supply the outer wall of the artery with blood; located in tunica adventitia of elastic arteries

vasa vasorum

vasa vasorum of elastic artery

tunica media of elastic artery

red arrow

tunica adventitia of elastic artery

red arrow

tunica intima of elastic artery

red arrow

elastin

red arrows

vasa vasorum of elastic artery

red circles

tunica intima of elastic artery

upper circle w/arrow

tunica media of elastic artery

big circle

tunica adventitia of elastic artery

big circle

tunica media extremely broad and surrounded by internal and external elastic lamina; tunica adventitia is very thin (not really visible in histo)

features of muscular arteries

tunica adventitia of muscular artery

red circle

tunica media of muscular artery

red circle: also notice elastic lamina surrounding the layer

muscular artery

what is this a slide of?

muscular artery

what is this a slide of?

veins

act as reservoirs of blood

large lumen; tunica adventitia is thicker than tunica media

features of veins

tunica media is very thin

features of arterioles

exchange of metabolites, gases, nutrients; control local blood flow

function of capillaries

artery

red arrow: artery or vein?

vein

red arrow: artery or vein?

brachiocephalic veins

subclavian artery

red circle

radial artery

red circle

ulnar artery

red circle

axillary artery

red circle

brachial artery

red circle

descending thoracic aorta

descending abdominal aorta

bronchial arteries

1. internal carotid
2. common carotid
3. vertebral
4. left subclavian
6.brachial
8.celiac trunk
9.left renal
10.ulnar
11.radial
12.superior mesenteric
13.inferior mesenteric
15.femoral
17.popliteal
20.anterior tibial
21.peroneal/fibular
22.posterior tibial
24.plantar
25.internal iliac
26.external iliac
27.common iliac
28.right renal
29.descending aorta
30. ascending aorta
31.right subclavian
32.brachiocephalic

arteries:
label #'s 1-4,6,8-13,15,17,20-22,24-32

1.celiac trunk
2.left gastric
4.splenic
8.gastroduodenal
12.right hepatic
14.left hepatic

arteries: label #'s 1,2,4,8,12,14

hepatic portal vein
superior mesenteric vein
inferior mesenteric vein
splenic vein
gastric vein

veins of hepatic portal system

1. inferior vena cava
2/3.gastrics
4.splenic
7. inferior mesenteric vein
14. superior mesenteric
16.hepatic portal vein
17/18. hepatics

veins: label #'s 1-4,7,14,16-18

allows another way for blood to reach the right atrium in case one of the vena cava is blocked; it runs along thoracic vertebrae

function of azygos vein

external jugular vein

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set