Heartbeat types, circulation of blood in animals and blood cells

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A myogenic heart is seen in Annelids and Arthropods

Life span of platelets is about 8 to 10 days

Aortic semilunar valve is present between the right ventricle and pulmonary artery

Arteries are located in deep locations

Initiation and stimulation of heartbeat takes place by nerves

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21. Heartbeat types, circulation of blood in animals and blood cells