Which of the following best describes a closed circulatory system?

Question

BlackTom AI · Accepted Answer

The question asks to identify which description best fits a closed circulatory system. We will evaluate each option in turn, outlining why it aligns or conflicts with the defining features of a closed circulatory system.

Option a: 'A circulatory system where blood is not confined to vessels and bathes the tissues directly.' This describes an open circulatory system, where hemolymph circulates freely in body cavities and is not restricted to vessels. In a closed system, blood remains within vessels, so this statement is incorrect for a closed system concept.

Option b: 'A circulatory system where blood is confined to vessels and flows under constant high pressure.' This matches key characteristics of a closed circulatory system: blood is contained within vessels (arteries, veins, capillaries) and movement is regulated by a heart, often sustaining higher, more controlled pressures compared to open systems. The phrase 'constant high pressure' is a bit general, but it aligns with the idea that pressure is maintained within vessels rather than bathing tissues openly, making this a plausible description.

Option c: 'A circulatory system where blood is pumped by a centralized heart and confined to vessels.' This also captures core features: blood is pumped by a heart (often centralized) and remains within a network of vessels, which are the hallmarks of a closed circulatory system. The wording emphasizes central pumping and confinement to vessels, aligning well with the standard definition.

Option d: 'A circulatory system where blood is pumped by multiple hearts and flows through a series of chambers.' While some organisms do have multiple hearts or chambered hearts, the defining trait for a closed circulatory system is the confinement of blood to vessels and a heart-driven pump, not the number of hearts or specific chamber arrangements. This description could apply to certain vertebrates or invertebrates with complex heart structures but is not the universal descriptor of a closed system. Therefore, it is not the best general description.

To summarize the reasoning for each option, we assessed how well each aligns with the hallmark of closed circulatory systems: blood confined to vessels and pumped by a heart. Options a and d introduce elements that deviate from the core definition (bathes tissues directly; multiple hearts with chambers). Options b and c both align with the central idea of blood confined to vessels and propelled by a heart, though option c emphasizes the centralized pumping and confinement more succinctly. This step-by-step evaluation highlights why the closed circulatory system is best described by options that stress confinement to vessels and heart-driven circulation, while clarifying the inaccuracies present in the other choices.

Which of the following best describes a closed circulatory system?

查看解析

登录即可查看完整答案

类似问题

The blood vessel that carries blood containing oxygen and nutrients away from the heart to all body tissues except the lungs is the:

The left side of the heart receives oxygenated blood from:

Please note that spelling matters on this question.One- to two-word answer. The main vein that returns deoxygenated blood from the body into the heart is the...

The juncture of the arterial and venous systems is found in the:

Which of the following sequences correctly represents the flow of blood through the circulatory system?

Which of the following can be confusing because it is a component of the circulatory system that carries oxygen-rich blood from the lungs to the heart?

What role does the circulatory system play in removing waste products from the body?

Which of the following is a primary function of the circulatory system?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单