Vascular Pathways Webquest !
Name: __________________
p246- You may use a search engine, your textbook and the recommended websites. Good Luck!
Bio 12
1. What do you remember about the parts of the heart? Go to the website below:
http://www.purposegames.com/game/label-the-hearts-parts-quiz
Click Start. Click on the part of the heart that matches the name given in the drop down
menu & the competition starts. Record your time here: _______ and your score: ______
2. The cardiovascular system includes two main circuits (pathways for blood to
follow).
I) Pulmonary Circuit- transports blood to the lungs
II) Systemic Circuit- transports blood to the body
A third section could also be considered called the Coronary Circuit which serves the
heart muscle itself. If you’re stuck, try this website for help:
http://learn.fi.edu/learn/heart/systems/circulation.html
In point form list 3 descriptors about the location of the coronary vessels:
-outside of heart, originate above aortic semi lunar valve, divide into many arterioles
3. Blood that flows through your body must travel through both arteries and veins
(connected by capillaries at tissues). Label the missing parts on the diagram below
see text pg 246
a) Jugular
vein &
Subclavian vein
e) Hepatic
b) Carotid
Artery &
Subclavian artery
Vein
c) Mesentric
arteries
d) Hepatic Portal Vein
h) Renal Arteries
f)
Renal Vein
g) Iliac Vein
i) iliac Artery
4. List the pathway of major arteries and veins (in the correct order) that blood would
take to leave the left ventricle and then travel from the heart to your fingertips & back.
 see pg 247
Left ventricle  aorta  subclavian artery  capillaries in
finger  subclavian vein  superior vena cava  right atrium
5. How do the following parts of the HEPATIC PORTAL SYSTEM -the liver, the small
intestine, hepatic portal vein, hepatic vein, inferior vena cava connect / work together?
The villi in the small intestine absorb broken down nutrients into the
blood. The hepatic portal vein connects capillaries in the small intestine
to the capillaries in the liver where blood is filtered. The “filtered”
blood is transported by the hepatic vein to the inferior vena cava to be
circulated through the heart again.
6. Watch these clips on the circulation inside a fetus and/or check pg 458 to answer Qs:
https://www.youtube.com/watch?v=dbq9Sy9l068 Or
http://www.screencast.com/t/LgRs7lpNK0LH
a) Where are CO2 and O2 exchanged in a fetus compared to an adult human?
Adults use their lungs but a fetus relies on the placenta
b) Where is blood detoxified in a fetus compared to an adult human?
Adults use their lungs but a fetus also has blood purified at the placenta
Due to the differences above, FETAL CIRCULATION has 3 structural differences
compared to adult circulation. Describe each structure below that is found in a fetus:
c) Ductous Venosous:
connects umbilical vein to the venae cava to bring the blood back to
the baby’s heart. It attaches right at the babies liver, but bypasses
most of the liver. This is why chemicals ingested by the mother
can seriously affect the baby!
d) Foramen Ovale:
an opening between the two atria, covered by a flap that acts like a
valve. Some of the blood from the right atrium is therefore pumped
through this flap and into the left atrium, bypassing the pulmonary
circuit.
 If the oval opening doesn’t close after birth, it can cause mixing of
blood and “blue babies”. Correct with open heart surgery.
e) Ductus Arteriousus
connects pulmonary artery and aorta. Much of the blood being pumped
out of the heart to the lungs will be directed away from the lungs and
into the aorta. Like the oval opening, the arterial duct’s function is to
bypass the pulmonary circuit.
7. Read one of the heart articles online at this site: http://www.iflscience.com/search/node/heart and
submit a 1-3 paragraph response to the information it presents on Ms Norris’s Bio12 HW Blog Site. Be sure
to sign your name. If you have time respond & comment to your classmates’ posts too!
8. You should now be just about ready to perform some open heart surgery…. Give it a try at:
http://www.pbs.org/wgbh/nova/eheart/transplant.html