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Describe how a mammalian heart is structurally adapted to its function

Describe how a mammalian heart is structurally adapted to its
function

Answers

gregory
? Cardiac muscles which contract and relax continually without fatigue/
myogenic
? Cardiac muscles are interconnected / a synclination form of network of fibres
to rapidly and uniformly spread the contractions
? Divided into four chambers for Atria to receive blood and ventricles to pump
blood out of the heart
? Divided into two sides by a longitudinal septum to prevent mixing of
oxygenated and deoxygenated blood / for double circulation
? Ventricles have thicker walls to generate high prevention pressure to pump
blood
? Wall of the left ventricle is thicker than that of right ventricle to pump blood
over a long distance.
? Have valves to prevent back flow of blood
? Cuspid valves have strands of connective tissues / tendinious codes / valve
tendons to prevent turning in/out during systole / when ventricles contract
? Has coronary artery to nourish / supply oxygen to the heart/muscles; has a
coronary vein to remove metabolic wastes carbon(iv)oxide
? Enclosed by a pericardium to keep it in position / prevent over dilation
? Pericardium secretes pericardial fluid to reduce friction / absorbs shock
? Has Sino Artrio Node (SAN) which acts as a pacemaker
? Has Atrio Ventricular Node (AVN) which relays contraction waves from SAN to
the puncinje tissues
? Has puncinje tissue / bundle of HIS to relay waves from AVN to the
ventricular myocardium
? Cardiac muscles have numerous mitochondria to generate energy for the
muscular contractions
? Has venacava and pulmonary vein to supply blood to the heart.
? Has aorta and pulmonary artery to transport blood away from the heart.
gregorymasila answered the question on January 26, 2018 at 06:20

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