The role of the excretory system is to rid the body of toxic waste products. which of these body systems also plays a direct role in removing waste products from the body? a) endocrine b) nervous c) respiratory d) skeletal

The correct answer would be C) respiratory system.

Respiratory system is made up of set of organs which help in taking in oxygen and expelling out carbon dioxide from the body.

In humans, it is composed of nose, pharynx, larynx, trachea, bronchi, pair of lungs, and diaphragm.

Alveoli (in lungs) are the site of gaseous exchange where oxygen is exchange with carbon dioxide.

Carbon dioxide is the toxic waste product of cellular respiration. Circulatory system helps in transporting CO₂ from cells to the alveolar site where it is exchanged with oxygen and excreted out as a part of exhaled air.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

i believe the answer would be b. hope it : )