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Transport in Organisms
Quick questions on The human circulatory system: N(A)-Level Biology Transport in Organisms
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the heart?Show answer
The heart is a muscular pump made mostly of muscle that never gets tired. It has four chambers: two at the top called atria (one atrium each side) and two at the bottom called ventricles. The right side and the left side are completely separated by a wall, so oxygen-rich and oxygen-poor blood never mix.
What are the three blood vessels?Show answer
Blood travels through three kinds of vessel:
What is double circulation?Show answer
Humans have a double circulation, which means the blood passes through the heart twice for each full trip around the body. There are two loops:
What is q1?Show answer
Name the chamber of the heart that pumps blood to the whole body. [1 mark]
What is q2?Show answer
State two differences between an artery and a vein. [2 marks]
What is q3?Show answer
Explain why humans are said to have a double circulation. [2 marks]
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