pacemaker is related to cardiac muscle.
pace maker is related to which part of body?
cardiac muscle
avian hearts are generally larger than mammalian hearts when compared to body mass. this adaptation allows more blood to be pumped to meet the high metabolic need associated with flight. birds, like the flamingo, have a very efficient system for diffusing oxygen into the blood; birds have a ten times greater surface area to gas exchange volume than mammals. as a result, birds have more blood in their capillaries per unit of volume of lung than a mammal. the american flamingo's four-chambered heart is myogenic, meaning that all the muscle cells and fibers have the ability to contract rhythmically. the rhythm of contraction is controlled by the pace maker cells which have a lower threshold for depolarization. the wave of electrical depolarization initiated here is what physically starts the heart's contractions and begins pumping blood. pumping blood creates variations in blood pressure and as a result, creates different thicknesses of blood vessels. the law of laplace can be used to explain why arteries are relatively thick and veins are thin.
american flamingo
he spent five seasons in france between 2012 and 2016, before he moved to hong kong, where he lives with his fiancée kimberley mosse and their son hayden.









































section::::career as a jockey.









































rispoli rode his first race in varese on polar eagle in february 2005. he finished second.









































on 19/2/05 he rode his first winner, pace maker.









































he was crowned champion italian jockey during the 2009 and 2010 racing seasons.
umberto rispoli