Fetal Pig Circulation

Front 1

Ductus arteriosus

Back 1

a small vessel that shunts blood away from the pulmonary arteries to the aortic arch

one of structures modifying fetal circulation

prevents lungs from being overworked, allows RV to strengthen

closes after birth

Front 2

color of arteries/veins (injected)

Back 2

arteries-pink (white if thick walled, such as aorta)
veins-blue

Front 3

Vena Cavae (Precava/Postcava)

Back 3

Veins that return deoxygenated blood from body to heart (empty into R atrium)

Inferior VC (Postcava, Posterior VC)- lower part of body

Superior VC (Precava, anterior VC)- upper part of body

Front 4

atria (auricles)

Back 4

blood collection center
-Right atrium receives DO blood from vena cavae
-Left atrium receives O blood from pulmonary veins

Front 5

ventricles

Back 5

collect blood from atrium, pumps blood out of heart

-RV pumps blood out to pulmonary arteries
-LV pumps blood to aorta (and outward)

Front 6

pulmonary artery

Back 6

blood travels from RV to lungs

only artery that carries deoxygenated blood (in adults)

Front 7

pulmonary vein

Back 7

oxygenated blood returns to LA

only vein that carries oxygenated blood (post-fetal)

Front 8

aorta

Back 8

-brings oxygenated blood to all parts of body
-largest artery
-originates from LV

Front 9

capillaries

Back 9

smallest vessels
diam. less than an RBC
Function: connect arteries & veins and interact with tissues

Front 10

arterioles

Back 10

smallest of true arteries
extends and branches out from an artery and leads to capillaries

Front 11

venules

Back 11

small type of vein

funtion: allows deox blood to return to veins from capillaries

arteries->capillaries->venules->veins->vena cavae->heart

Front 12

umbilical arteries

Back 12

2, med. sized
move blood to placenta for oxygenation

an exception for arteries normally carrying ox blood

Front 13

umbilical vein

Back 13

1, large

oxygen from mother's blood diffuses across placenta into fetal blood through the umbilical vein

an exception to veins normally carrying deox blood

Front 14

allantoic stalk

Back 14

smallest vessel in center of umbilical cord

Front 15

brachiocephalic veins

Back 15

the precava brances a short distance superiorly from the heart
-the brances are the brachiocephalic veins
-brings deox blood from subclavians and jugulars to pre cava

Front 16

jugular veins

Back 16

internal and external (2 on each side of neck)

bring deox blood back from head to heart via the superior vena cava

Front 17

renal veins

Back 17

veins leading to kidneys
drain the kidneys
joins postcava

Front 18

hemiazygous vein

Back 18

arched vein that runs down the back of thoracic cavity
receives blood from rib cage

Front 19

pulmonary trunk

Back 19

-artery
-above the coronary arteries, you should see a large white vessel coming from RV.
-branches into pulmonary arteries

in fetus, the ductus arteriosus connects the pulmonary trunk to the aorta (skipping lungs)

Front 20

femoral vein

Back 20

commonly used for IV drugs

Front 21

brachiocephalic artery and L subclavian artery

Back 21

on the top of the aortic arch there are 2 blood vessels
-R vessel is the brachiocephalic artery
--branches to form carotid and R subclav
-L vessel branches into brachial artery as it passes into the arm

Front 22

carotid arteries

Back 22

in neck
supply Ox blood to brain

Front 23

renal arteries

Back 23

branch off from aorta to supply blood to kidneys

Front 24

iliac arteries and veins

Back 24

transport blood to and from legs

Front 25

femoral arteries

Back 25

large artery of thigh
continuation of iliac (which comes from aorta)