On page 7 you will find a figure. in this figure you will see that organisms lead to population and populations lead to communities. what do communities lead to

Ecosystem

Explanation:

A community refers to all the animals and plants that coexist in a given area. A community leads to an ecosystem. An ecosystem is an ecological unit consisting of a community of living organisms and its physical environment. Such a unit will consist of plants, animals and microorganisms as well as non-living components like water, soil and air.

they are known to reach a speed of 21 miles per hour

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.