Circulatory Systems
Overview
Every one of your cells needs a constant delivery of oxygen and food and a constant removal of waste. With billions of cells, diffusion alone is far too slow, so animals use a circulatory system: blood, driven by a pump through a network of vessels, with valves to keep it flowing one way.
In this lesson you will learn what a circulatory system is. Extended students will compare the single circulation of a fish with the double circulation of a mammal, and discover why passing the blood through the heart twice gives mammals a real advantage.
Objectives
- Describe the circulatory system as a system of blood vessels with a pump and valves to ensure one-way flow of blood
- [Supplement] Describe the single circulation of a fish
- [Supplement] Describe the double circulation of a mammal
- [Supplement] Explain the advantages of a double circulation
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Circulatory Systems. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- A circulatory system consists of blood vessels, valves and a: A. lung B. pump C. kidney D. gill Answer: B
- [Supplement] In a single circulation, the blood passes through the heart: A. twice per circuit B. once per circuit C. three times per circuit D. never Answer: B
- [Supplement] A double circulation is found in a: A. fish B. mammal C. flatworm D. jellyfish Answer: B
- [Supplement] The main advantage of a double circulation is that blood reaches the body at: A. low pressure B. high pressure C. low temperature D. high humidity Answer: B
- Valves in a circulatory system ensure that blood: A. flows in one direction B. carries more oxygen C. moves by diffusion D. stays in the gills Answer: A
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Recommended Books
Practice Mock Questions
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