Question

exam lesson name: introduction to human anatomy and physiology
exam number 700704rr
exam guidelines
exam instructions
question 17 of 20 :
select the best answer for the question

1. the heart and blood vessels together comprise a/an

a. tissue
b. organ system
c. organ
d. organism
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Explanation:

To solve this, we analyze each option:

• Option A: A tissue is a group of similar cells. The heart and blood vessels are not tissues.
• Option B: An organ system is a group of organs that work together. The heart (an organ) and blood vessels (organs) work together for circulation, so they form an organ system.
• Option C: An organ is a single structure. The heart is an organ, but blood vessels plus heart are more than one organ.
• Option D: An organism is a whole living being (like a human), not just heart and blood vessels.

Answer:

B. organ system