Body+Temperature+&+Circulatory+System

​frogs breathe by creating pressure forces air into their lungs this is also an amphibian 

 Birds have four chambered heart with two seperate verticles most birds have a rapid heart beat ,fishes also have the circulatory system blood vessels and blood. the blood returns to the heart through veins circulatory system of a fish delivers oxygen and nutrients to the cells of the body it also transports wastes produced by metabolism carbon dixode and amomionia to the gills and kidneys for elimination even reptiles upload were carbon dioxde and waste are picked up and returns dexogenated the heart of a aboney fish has two chambers in a row.deoxygenated blood from the body into a collecting ,chamber moves into the larger atrium contraction of the atrium speeds up the blood brives into the musculer verticle the main pumping chamber of the heart is the crontraction of the verticle provides most of the force that drives the blood through the circulatory system the three main chambers of the heart for an amphibians reflects the division of the circulatory system into the pulmonary and sysmetic circulation deoxygenated blood from the body .the structure of the mammals with four chambers allows efficient causing it to pump blood throughout the body the spetum presents oxygenated and deoxgenated blood from mixing we also found something more interesting about the vertebra the veterbra has bones or carthilage that surround the dorsal nerve and form a spine ,the septum in lizards,snakes ,tuortrios ,turtles the heart has two atria and a single ventricle divdided by a wall of tissue called septum.