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Cardiovascular System - Coggle Diagram
Cardiovascular System
Function
Protection
Regulation
Transport
- Gases: oxygen, carbon dioxide, nitrogen
Nutrients: glucose, amino acids, vitamins, proteins, lipids
Components
Blood vessels: arteries, veins, capillaries
Heart
Blood
BLOOD
Composition:
Leukocytes (WBC)
white blood cells - complete cells, nuclei & organelles - various types e.g. neutrophils, lymphocytes, monocytes, eosinophils, basophils
mainly help in protection: phagocytosis, immune response (cell medicated, antibody mediated, develop into macrophages, realise histamines etc. :
Erythrocytes (RBC)
Red blood cells
Biconcave disc shaped, 7.5 um non- nucleated, no organelles
contain haemoglobin (Hb), a pigmented protein
carries oxygen: from lungs to tissues, 1.5% dissolved in plasma & 98.5% attached to haemoglobin
carries carbon dioxide from tissue to lungs, 7% in plasma, 23% attached to haemoglobin, 70% as HCO3-
HEART
Protection:
rib cage, protective membranes, fluids
Function:
Pump: Generate pressure in the blood
Routes blood: separate pulmonary and systemic circulation
One way
Regulate blood supply :
Location:
Thoracic cavity, obliquely in mediastinum, medial to two lungs, superior to diaphragm
Size of closet fist, above 300g
Blunt cone, 2/3 towards left side of midline
rounded end is apex, anteriorly and inferiorly pointed, above diaphragm
Broader end is base, directed posteriorly and slightly superiorly
Pericardium -
BLOOD VESSELS
Arteries:
take blood away from the heart
contain blood under pressure
elastic, muscular, arterioles
Capillaries
site of exchange with tissues
take blood to the heart
blood not under pressure
thinner walls than arteries, contain less elastic tissue, less
smooth muscle
venules, small, medium, large
