For a vertebrate animal to obtain and use energy,
A) the digestive system is used to break down oxygen to be stored in cells.
B) the circulatory system must provide carbon dioxide to cells.
C) the circulatory,respiratory,digestive,endocrine,and nervous systems are some systems involved.
D) only one organ system,the digestive system,is needed.

Question

Quizplus · Accepted Answer

Obtaining and using energy requires the coordination of several organ systems, including the circulatory, respiratory, digestive, endocrine, and nervous systems. The circulatory system delivers oxygen and nutrients to cells, while removing waste products like carbon dioxide. The respiratory system helps exchange gases between the body and environment. The digestive system breaks down and absorbs food to provide energy and nutrients. The endocrine system helps regulate metabolism and energy balance. The nervous system coordinates and controls all these processes. Therefore, choice C is the best answer. Choice D is incorrect because while the digestive system is an important part of energy acquisition, it cannot function alone without the other organ systems.

For a Vertebrate Animal to Obtain and Use Energy