Cardiovascular Systems and The Heart

Question 1

Outline the DOUBLE PUMP CIRCULATORY SYSYEM

Answer 1

• CV, Circulatory Systems, and Respiratory Systems work together
• To deliver O2 and remove CO2 to/from tissues

Question 2

Describe the PULMONARY CIRCUIT

Answer 2

• Deoxy-Blood carried to Lungs from Right Ventricle at High Pressure via Pulmonary Artery
• Oxy-Blood carried from Lungs to Left Atrium via Pulmonary Vein

Question 3

Describe the SYSTEMIC CIRCUIT

Answer 3

• Oxy-Blood carried around body from Left Ventricle at High Pressure via Aorta
• Deoxy-Blood carried from body to Right Atrium at Low Pressure via Vena Cava

Question 4

Define VENOUS RETURN

Answer 4

• Volume of Blood returning to Right Atrium of Heart
• Via the Vena Cava

Question 5

What are the FACTORS affecting VENOUS RETURN?

Answer 5

• Cardiac Output- When increased blood is pumped rapidly from veins
• Skeletal Muscle Pump- Muscle Contraction causes valves to open to increase Venous Return
• Blood Volume- Pressure Increase
• Respiration- Pressure Decrease in Thoracic Cavity during Inhalation draws more blood to Right Atrium