1. Circulatory System

2. Circulatory System Components
Vessels
Veins, arteries, capillaries
Blood
Heart

3. Blood Functions Delivers nutrients and oxygen Takes out wastes
Transports hormones
Maintains temperature and pH
Prevents infection
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4. Circulatory Anatomy Circulatory system has three circuits:
Pulmonary circuit
Coronary circuit
Systemic circuit

5. Circulatory Anatomy: Important Vessels
Veins: bring blood in
Superior vena cava
Inferior vena cava
Pulmonary veins
Arteries: take blood away
Pulmonary arteries
Aorta
Capillaries: tiny vessels where gas exchange occurs

6. Heart Anatomy The heart: Septum Apex Atria Ventricles Valves
Chordae tendinae p

7. Circulatory Circuit Deoxygenated blood: Oxygenated blood
Body->vena cava -> right atrium->right ventrical-> pulmonary artery->lungs
Oxygenated blood
Lungs->pulmonary vein ->left atrium->left ventrical->aorta-> body
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8. Blood Pressure Force exerted on arterial wall 2 numbers:
Systole: contraction of ventricle (top number)
Diastole: relaxation of ventricle (bottom number)
Hypertension/Hypotension

9. Blood Pressure Category
Systolic mm Hg (upper #)
Diastolic mm Hg (lower #)
Normal  
less than 120
and
less than 80
Prehypertension
120 – 139 or
80 – 89
High Blood Pressure (Hypertension) Stage 1
140 – 159
90 – 99
High Blood Pressure (Hypertension) Stage 2
160 or higher
100 or higher
Hypertensive Crisis (Emergency care needed)
Higher than 180
Higher than 110

10. Pulse Frequency of heart beats Take pulse at “pulse points”
Controlled by SNS and PSNS, adrenal and thyroid, age, activity
Take pulse at “pulse points”
Radial or brachial artery, carotid, temporal, popliteal, femoral, dorsalis pedis
Conditions:
Tachycardia
Bradycardia