Differentiate between species richness management approach and indicator species management way

In general, are there any major differences that you can see? explain

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.