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CHAPTER 7
CIRCULATORY SYSTEM
STRUCTURE AND FUNCTION
Ms. Doshi
Overall Structure
Circulatory System
• the heart (cardi/o-)
• the blood vessels (-vascul/o)
• the lymphatic system (involves a fluid called
lymph)
Function
The cardiovascular system:
Carries oxygen, nutrients, vitamins, and
antibodies to the cells.
Carries waste and carbon dioxide away from
the cells.
Maintains the acid-base balance of the body,
prevents hemorrhage through blood clotting,
and helps regulate body temperature.
Exercise 1
Structures of the Cardiovascular System
Memorize for Short Quiz
Quiz in Quizlet
Quiz
15
14
1
2
13
12
3
4
11
5
10
6
7
9
8
Transportation of Oxygen in the Blood
Oxygen-rich blood (Oxygenated Blood)
Heart to other parts of the body:
heart
arteries
arterioles
capillaries
capillaries
(oxygen-carbon dioxide exchange)
Oxygen-poor blood (Deoxygenated Blood)
Other parts of the body back to the heart:
capillaries
venules
veins
venae cavae
heart
Exercise 2
Circulation of Blood through the Heart
From body
To heart
To lungs
From lungs
From heart
To body
Valves of the Heart
atrioventricular valves:
• valves between the atria
and ventricles
• two kinds: tricuspid (right)
and bicuspid (mitral) (left)
pulmonary semilunar valve:
regulates blood flow to the
lungs
aortic semilunar valve:
regulates blood flow to the
aorta
Quiz in Quizlet
What are the valves?
3
4
1
2
The Three Layers
The three layers of the heart:
endocardium
-lining of the heart
myocardium
-muscular middle layer of the
heart
pericardium
-sac that surrounds the heart
The Pericardium
pericardium-sac that
surrounds the heart
visceral pericardium
(epicardium)
-innermost layer of the
pericardium
parietal pericardium
-middle layer of the
pericardium
fibrous pericardium
-outermost layer of the
pericardium
Quiz in Quizlet
What is it?
1
2
3
5
4
Coronary Arteries
Coronary Artery:
Blood vessels that supply
oxygen to the heart.
Coronary Arteries
Quiz in Quizlet
Coronary Arteries
1
8
2
3
7
4
6
5
Exercises 3 & 4
https://youtu.be/ABTvNR59K5Q
Any Questions?
Any Answers?
Any Comments?