Megan Wiggins
COMM 1010-077
4/26/2014
Speech Outline
Blood Flow of the Heart
I.
Introduction
A. Hook: We all have a heart or we wouldn’t be here today. But how many of you actually
know how it works?
B. Expertise: Lab Ass. for anatomy this semester and teach the students or help them get a
better understanding.
C. Thesis: Basic anatomy of a human heart and circulation (Blood Flow).
D.
E. Preview: First anatomy of the heart, Second Heart circulation
(Transition: To know how blood flows through the heart I need to first go over some basic anatomy
structures of the heart first.)
II.
Body
A. The anatomy of the heart has external structure and internal structures. (List of structures from
SLCC Lab handouts)
1. External Structures
a. Aorta
b. Sup. and Inf. Vena Cava
c. Pulmonary
- Veins: Carry blood back to the heart. (McKinley)
- Arteries: Carry blood away from the heart. (McKinley)
- Trunk
d. R/L coronary arteries
e. Coronary Sinus
2. Internal Structures
a. Chambers
- R/L Atriums
- R/L Ventricles
b. Valves
- R/L AV valve
- Aortic semilunar valve
- Pulmonary semilunar valve
(Transition: Now that we know the main structures of the heart, we can talk about the circulation and
flow of blood through the heart.)
B. There are two main types of heart circulation Pulmonary Circulation and Systemic Circulation.
1. Pulmonary Circulation
a. Right side of heart
b. Blood to lungs
- Get rid of Carbon Dioxide and gets Oxygen
c. Blood returns to left side of heart
2. Systemic Circulation
a. Left side of heart
b. Carries blood to organs and tissues in body
c. Returns via vena cava to right atrium
III.
IV.
Conclusion: That is the blood flow through the heart. Hopefully you were able to get a
better understanding of the main structures and circulation of the heart.
Work Cited:
McKinley, Michael P., O’Loughlin (2008). Human Anatomy: 2nd ed. McGraw Hill
SLCC White Sheet Handouts for anatomy students http://slccanatomy.wordpress.com/