This system is a collection of glands that secret into the circulatory system to be delivered to the body’s vital organs:
a. Respiratory
b. Circulatory
c. Nervous
d. Endocrine
d. Endocrine
The correct answer is d. Endocrine.
The endocrine system is a collection of glands that secrete hormones directly into the circulatory system. These hormones are then transported through the blood to various organs and tissues in the body to regulate their functions. Some of the major glands in the endocrine system include the pituitary gland, thyroid gland, adrenal glands, pancreas, and ovaries/testes.
The correct answer is d. Endocrine.
Explanation:
To get the answer to this question, we need to understand the functions and characteristics of different body systems.
- The respiratory system is responsible for the exchange of gases (oxygen and carbon dioxide) between the body and the external environment through processes like breathing and gas exchange in the lungs. It does not involve the secretion of hormones.
- The circulatory system, also known as the cardiovascular system, is responsible for the transportation of oxygen, nutrients, hormones, and other essential substances throughout the body via the blood vessels and the heart. While it transports hormones, it does not secrete them.
- The nervous system is responsible for transmitting signals and coordinating the activities of different organs and tissues through electrical impulses and neurotransmitters. It does not involve the secretion of hormones.
- The endocrine system is a collection of glands that secrete hormones directly into the bloodstream. These hormones are then transported to various target organs and tissues to regulate and control various functions and processes in the body, such as growth, metabolism, reproduction, and response to stress.
Based on this information, the correct answer is d. Endocrine, as it is the only system mentioned that involves the secretion of hormones into the circulatory system.