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Blood fluids and circulation - Coggle Diagram
Blood fluids and circulation
Human Circulatory System
Blood vascular system
Heart
Blood
Plasma
Formed elements
RBC
WBC
Granulocytes
Neutrophils
Basophils
Eosinophils
Agranulocytes
Lymphocytes
B-Lymphocytes
T-Lyphocytes
Monocytes
Platelets
Blood vessels
Arteries
Away from Heart
Thick,elastic walls
Their Lumen has no valves
3 layers
Tunica Externa
White fibrous connective tissues
Nourishes the arterial wall
Tunica Media
Smooth muscle fibres and connective tissue
Tunica Interna
Endothelial cells
Veins
Thin
Towards heart
Lumen has valves and is wider
Thin, muscular walls
Same 3 layers as arteries but the tunica media is thinner
Lympatic system
Lymph
Lymph nodes
Lymph vessels
Thymus (gland)
Spleen
Heart
Location
In the thoracic cavity between the lungs
Lower conical part is slightly tilted to the left
Size and Shape
conical shape, fist size and 300g in man and 280g in women
Enclosed in percardium
Fibrous pericardium
prevents heart expansion
Serous pericardium
Perietal Layer
forms the lining of fibrous pericardium
Visceral layer
Adheres to heart and makes up its outer covering
Protects the heart from external shocks and also keeps the heart moist
External structure
4 chambered
2 Auricles
Demarcated by Internal Sulcus/groove
Upper part
2 Venticles
Large lower part
Demarcated by Interventricular sulcus
Demarcation by Coronary sulcus
Myogenic
NO sinus venosus
3 sulcus or grooves on the heart
Internal Structure
Internal structure of heart
Auricles
Ventricles
Great blood vessels