The Circulatory System

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The Circulatory System

• Structures?
• Types of Blood Vessels?
• Purpose of Blood Cells...

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Structure of the Human Heart - ChoicesDarker
blood vessel have no oxygen.

• Septum
• left or right atrium
• right or left ventricle
• valve (4x)
• pulmonary vein
• pulmonary arteries
• aorta

• Superior Vena Cava
• Inferior Vena Cava

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Materials

• Heart model
• Xerox of heart and circulatory system

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Which blood vessel has the most
oxygen (oxyhemablobin)?
The Pulmonary Vein
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Structure of the Human Heart - ChoicesDarker
blood vessel have no oxygen.

• Septum - 8
• left atrium - 3
• right atrium - 12
• right ventricle - 9
• left ventricle - 7
• valves (4x) - 6, 5, 11
• pulmonary vein(2x) - 4, 13
• pulmonary arteries(2x) - 14, 2
• aorta - 1

• Superior Vena Cava 15
• Inferior Vena Cava - 10

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Arteries vs. Veins

• Towards heart
• Muscles of legs and arms pump the blood through
  the body (valves)
• low pressure of thoracic cavity
• thin-walled
• wide
• slow

• Away from heart
• Heart is used to pump the blood through the body
• Thick-walled
• Narrow

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One-way vales are present in veins.
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37-1
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Plasma

• Mostly water (90)
• 10 that remains.
• Salts
• Sugars
• Plasma proteins
• Serum albumin regulates osmotic pressure
• Globulins help with immune system
• Fibrinogen helps with blood clotting

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Blood Cells

• Red
• White
• Platelets

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Red Blood Cells

• Carry oxygen
• Hemoglobin
• Lack nucleus

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White Blood Cells(leucocytes)

• Produced in bone marrow
• 20 different types e.g.
• Macrophages engulf bacteria
• Lymphocytesproduce antibodies to fight disease

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Platelets

• clotting

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Lymphatic System

• A one-way system that brings excess tissue fluid
  back to the heart.
• Lymph nodes sample this returning tissue for
  antigens (infections).

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The Circulatory System

• Structures?
• Types of Blood Vessels?
• Purpose of Blood Cells...