Download Bio102_Lab2

Biology 102
Laboratory 2
Human Heart Anatomy
Steer Heart
Cardiac Muscle Histology
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Objectives for today’s lab
• Lab Exam Objectives: After completion of this lab,
you should be able to:
– Identify the anatomical structures of the human heart listed
below using heart models, or photographs of models or
hearts. (American Heart Model is best)
– Identify the anatomical structures of the steer heart listed
below using heart models, or photographs of models or
hearts.
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Heart – Anterior View
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Heart – Posterior View
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Heart – Coronal Section
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Chambers of Heart/Blood Flow
Figure from: Martini,
Anatomy &
Physiology, Prentice
Hall, 2001
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Coverings of Heart
Figure from: Martini,
Anatomy &
Physiology, Prentice
Hall, 2001
Fibrous pericardium = pericardial sac (outermost layer)
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Wall of Heart
Three layers
• endocardium
Figure from: Hole’s Human A&P, 12th edition, 2010
• forms protective inner
lining
• membrane of epithelial
and connective tissues
• myocardium
• cardiac muscle
• contracts to pump blood
• epicardium
• serous membrane
(visceral pericardium)
• protective covering
• contains capillaries and
nerve fibers
Know all the layers depicted
in the diagram, and know their
correct order.
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Heart Valves
Pulmonary and Aortic Valve
Tricuspid Valve
Figures from: Hole’s Human A&P, 12th edition, 2010
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Blood Supply to Heart (Coronary circulation)
Anastamoses =
connections between 2 or
more branches of arteries
that supply the same region
with blood.
Give rise to collateral
circulation
(LAD)
Blood flow through
coronary arteries takes
place mainly during
relaxation of the
ventricles (ventricular
diastole)
Figure from: Martini,
Anatomy &
Physiology, Prentice
Hall, 2001
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Blood Supply to Heart
Cardiac veins join
at an enlargement
called the coronary
sinus that drains
into the right
atrium
Figure from: Martini,
Anatomy &
Physiology, Prentice
Hall, 2001
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Brachiocephalic
artery
Superior
vena cava
Right
atrium
Aorta
Pulmonary
trunk
Left
atrium
Right
ventricle
Left
ventricle
Apex of the
heart
From: Marieb and Mitchell , 10th edition, Pearson
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Aorta
Aortic semilunar valve
Right
atrium
Left atrium
Tricuspid valve
Bicuspid
valve
Myocardium
Chordae
tendineae
Right ventricle
Interventricular
septum
Left ventricle
From: Marieb and Mitchell , 10th edition, Pearson
Trabeculae
carneae
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Left
atrium
Aorta
Aortic
semilunar
valve
Bicuspid
valve
Tricuspid valve
Chordae
tendineae
Right
ventricle
Left
ventricle
Interventricular
septum
Papillary
muscles
From: Marieb and Mitchell , 10th edition, Pearson
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Calf Heart
From: http://www.nietvergeten.com/jeroen_advocaat/englisch/medical_illustration.htm#20
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Things you should do in lab today
• Identify the structures listed on your Laboratory
Guide
– Human heart models (I suggest you become familiar
with the human heart before beginning dissection)
– Steer heart
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Next Lab…
• Blood Vessel Anatomy
– See Exercise 32 in Marieb’s Lab Manual
• Be sure to review what you did today and
complete Review Sheet for Exercise 30 in your
lab manual.
– You will be combining blood flow in the heart with
what you’re learning about blood vessels.
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