Transcript DHO 6:8 and 6:9

DHO Unit 6:8
Anatomy and Physiology
Circulatory System
6:8 Circulatory System
AKA the cardiovascular system
 Consists of heart, blood vessels,
and blood
 Transports oxygen and nutrients to
body cells
 Transports carbon dioxide and metabolic
materials away from the body cells
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Heart
 Muscular, hollow organ functions as pump
 Size of a closed fist
 Location
– Slightly to the left of the sternum
– Between the 4th and 5th intercostal
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Heart Exterior and Interior
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Anatomy
 Heart chambers
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Right Atrium
Right Ventricle
Left Atrium
Left Ventricle
 Septum
 Valves
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Tricuspid
Pulmonary
Mitral
Aortic
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Layers of the Heart
 Endocardium
 Innermost Layer
 Myocardium
 Thickest Layer
 Pericardium
 Membrane that covers the heart
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Blood Vessels
 Blood carried throughout
body in blood vessels
– Arteries
– Capillaries
– Veins
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Blood Vessel Disection
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Blood Flow Through the Body
(Systemic Circulation)
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Blood Flow
Normal Blood Flow Through the Heart
Double Click this link to go to the National Institute of
Health’s page to see how normal blood flow looks and
sounds ….
Be patient! Give it a second to load.
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Taking Your Pulse
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When your heart pumps blood through your arteries, it creates a pulse that you can
feel on the arteries close to the skin's surface. For example, you can feel the pulse on
the artery inside of your wrist, below your thumb.
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You can count how many times your heart beats by taking your pulse. You will need
a watch with a second hand (or look at the clocks above each door!).
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To find your pulse, gently place your index and middle fingers on the artery located
on the inner wrist of either arm, below your thumb. You should feel a pulsing or
tapping against your fingers.
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Watch the second hand and count the number of pulses you feel in 30 seconds.
Double that number to find out your heart rate or pulse for 1 minute.

The usual resting pulse for an adult is 60 to 100 beats per minute. To find your
resting pulse, count your pulse after you have been sitting or resting quietly for at
least 10 minutes.
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Blood
 Average adult: 4-6 quarts
 Blood circulates continuously throughout the
body
 Transports many substances
 Plasma
 Blood cells
– Erythrocytes or red blood cells
– Leukocytes or white blood cells
– Thrombocytes
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Diseases and Abnormal Conditions
Arteriosclerosis and Atherosclerosis
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More Diseases and
Abnormal Conditions
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Anemia
Aneurysm
Arrhythmias
Congestive heart failure (CHF)
Embolus Hemophilia
Hypertension
Leukemia
Myocardial infarction – heart attack
Phlebitis
Varicose veins
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6:9 Lymphatic System
The lymphatic system is part of the circulatory system, comprising a
network of lymphatic vessels that carry a clear fluid called lymph (from
Latin lympha meaning water) directionally towards the heart.
Removes waste and excess
fluid from the tissues
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Lymph
Lymphatic vessels
Lymph nodes
Lymphatic ducts
Lymph tissue
Spleen
Thymus
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Lymphatic and Venous Systems Working Together
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Diseases and Abnormal
Conditions
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Adenitis
Hodgkin’s disease
Lymphangitis
Splenomegaly
Tonsillitis
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