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Circulatory System - Coggle Diagram
Circulatory System
Blood Vessels
Arteries
Thick Walls
High Blood Pressure
Away from Heart
Veins
Valves
Low Blood Pressure
Towards Heart
Capillaries
Sites of Gas Exchange
Outer Layer
Non-Elastic Collagen Fibres
Middle Layer
Muscle and Elastic Fibres
Inner Layer
1 Layer of Cells
Heart
Valves
Aortic (semilunar) Valve
Pulmonary (semilunar) Valve
Bicuspid Valve
Tricuspid Valve
Vessels
Vena Cava
Pulmonary Artery
Aorta
Pulmonary Vein
Coronary Artery
Structures
Left Ventricle
Septum
Function
Seperates left and right side of heart
Left Atrium
Pericardium
Right Ventricle
Right Atrium
Cardiac Muscle
Sinoatrial Node
Function
Pacemaker - knot of specialised muscle cells
Controls Heartbeat
Pulses and causes atria to contract
Location
Top wall of right atrium
Atrioventricular Node
Function
Pacemaker - knot of specialised muscle cells
Controls Heartbeat
Electrical impulse from SA node causes impulse thown through septum which pulses thin muscle fibres and causes ventricles to contract
Location
Junction between right atrium and right ventricle (in septum)
Heartbeat
Systole
Contraction of Heart Muscle
Diastole
Relaxation of Heart Muscle
Pulse
Expansion and Contraction of Arteries
Pulse Pressure
Pressure exerted by blood on walls of vessels
Closed Circulatory System
Systemic Circuit
Body - Heart - Lungs
Pulmonary Circuit
Lungs - Heart - Body