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The Cardiovascular System

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Questions and Answers

Which of the following is a reason why unicellular organisms do not need a cardiovascular system?

They do not require nutrients or produce waste

They have a different method of nutrient delivery

Diffusion time for oxygen and glucose is very short

They rely on diffusion through their cell membrane (correct)

In small multicellular organisms like C. elegans, the diffusion time for oxygen is approximately how long?

90 seconds

3.6 seconds

1.2 seconds

30 seconds (correct)

For larger organisms like humans, why is a cardiovascular system essential?

They require a more efficient method of nutrient delivery and waste removal (correct)

Diffusion time for oxygen and glucose is very short

Their cells are more resistant to diffusion

They have a higher metabolic rate

Which of the following is NOT an essential part of the cardiovascular system?

<p>Veins</p> Signup and view all the answers

What is the definition of the cardiovascular system?

<p>The system responsible for circulating blood and lymph in the body</p> Signup and view all the answers

The Cardiovascular System

Choose a study mode

Podcast

Questions and Answers

Which of the following is a reason why unicellular organisms do not need a cardiovascular system?

In small multicellular organisms like C. elegans, the diffusion time for oxygen is approximately how long?

For larger organisms like humans, why is a cardiovascular system essential?

Which of the following is NOT an essential part of the cardiovascular system?

What is the definition of the cardiovascular system?

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