Objectives:
• Today we will…
– Debrief heart diagrams
– POGIL: Circulatory System
– Dissection
• So that we can…
– Trace the flow of blood through the heart.
– Identify the key structures in a heart and their
function.
Bell Work:
Please take out
your heart diagram
homework.
Check the LABELS
on your diagram:
Check the COLORS
on your diagram:
Vessels:
– Vena Cava = The vein that carries
blood from the body to the heart
– Pulmonary Artery = The artery
that carries blood away from the
heart, to the lungs
– Pulmonary Veins = the veins that
carry blood from the lungs back to
the heart
– Aorta = the artery that carries
blood away from the heart, to the
body
Discuss:
• What is the difference between an artery and
a vein? (Hint: Think about the direction of
blood flow.)
• Are there any arteries that carry
deoxygenated blood? Are there any veins
that carry oxygenated blood?
• What does “pulmonary” mean?
Valves:
4 Valves:
– Doorways that separate
the different chambers
– 4 valves – one leaving each
chamber
– Keep blood from flowing
backwards
POGIL:
• Please complete the POGIL about the
circulatory system.
• You may work with your partner, but each
person must write their own answers in their
own words.
Lab Safety
Clear tables of ALL unnecessary items
•
–
Absolutely no eating or drinking in the lab
Dissection Tools:
•
-
Only cut the specimen when IN the
dissection pan (NOT in your hand)
Cut away from fingers
Be gentle, do not force cuts
Zero tolerance policy for any inappropriate behavior during
dissection
Accidents:
•
-
Notify the teacher immediately if any accidents occur (especially
if you are hurt or if a tool is broken) so that I can make sure
everyone stays safe!
Exterior of the Heart:
Interior of the Heart:
Lab Clean Up:
•
•
Place dissected hearts in the garbage
Wipe tools & tray with disinfecting
wipes.
–
–
–
•
•
Do NOT use the sink for this!
Take the mat out of your tray, wipe all sides.
Place dissecting mat and all tools on a clean
paper towel at your table.
Wipe table with disinfecting wipes.
Wash hands in the sink.
When you are finished, please sit
at your table.
Debrief:
• Watch this heart dissection
https://www.youtube.com/watch?v=-JerRPgnVGs
(or search for “Mr. Hayashi’s Sheep Heart” on Youtube)
• This is a different way to dissect a heart – he
makes 1 cut across the whole heart instead of
2 cuts into each side of the heart like we did –
so you see structures from a different angle.
• Can you add any information to your answers
based on this video?
Homework:
• Worksheet to prepare for Friday quiz on the
circulatory/respiratory system and the
dissection of the heart.
• Labs (with Heart Diagram & POGIL) due
MONDAY!
Slides not used
Debrief Homework:
The Exterior of the Heart:
Structure of the Heart:
• The Heart Has 4 Chambers:
1) Right Atrium – Chamber where
blood enters the heart from the
body
2) Right Ventricle – Chamber that
pumps blood out to the lungs
Structure of the Heart:
• The Heart Has 4 Chambers:
3) Left Atrium – Chamber where
blood enters the heart from
the lungs
4) Left Ventricle – Chamber that
pumps blood out to the body
Structure of the Heart:
4 Valves:
– Doorways that separate
the different chambers
– 4 valves – one leaving each
chamber
– Keep blood from flowing
backwards
Structure of the Heart:
4 Major Blood Vessels:
– Vena Cava = The vein that carries
blood from the body to the heart
– Pulmonary Artery = The artery
that carries blood away from the
heart, to the lungs
– Pulmonary Veins = the veins that
carry blood from the lungs back to
the heart
– Aorta = the artery that carries
blood away from the heart, to the
body
Structure of the Heart:
• 2 Sides: Right & Left
– Directions are determined as if
in your own body
– Separated by the septum, a
thick wall down the middle
What is the pathway that blood follows
through the body?
The Heart Needs Blood Too!
Coronary Arteries
– Small arteries on the
outside of the heart
– Supply the heart muscle
itself with blood
– This is what becomes
blocked during a heart
attack