CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 34, Problem 1TYU
Which of the following respiratory systems is not closely associated with a blood supply?
- A. the lungs of a vertebrate
- B. the gills of a fish
- C. the tracheal system of an insect
- D. the skin of an earthworm
Expert Solution & Answer
Summary Introduction
Introduction:
Respiratory system consists of organs that take part in the process of respiration. Respiration is a process, in which food is broken down into simpler components releasing energy. Respiratory system consists of organs that participate in the exchange of gases.
Answer to Problem 1TYU
Correct answer:
The tracheal system of an insect is not associated with a blood supply. Therefore, option (C) is correct.
Explanation of Solution
Reasons for the correct statement:
Tracheal system of an insect consists of spiracles, which is a series of holes or openings. These spiracles are responsible for respiration in insects. Spiracles do not have any blood supply.
Option (C) is given as “the tracheal system of an insect”.
As “the tracheal system is not associated with blood supply”, it is the right answer.
Hence, option (C) is correct.
Reasons for the incorrect statements:
Option (A) is given as “the lungs of a vertebrate”.
The lungs of a vertebrate are connected with blood capillaries. These capillaries bring deoxygenated blood to the lungs and carry away oxygenated blood. So, it is a wrong answer.
Option (B) is given as “the gills of a fish”.
Gills of a fish have gill lamellae and it contains blood within itself. The blood in gill lamellae flows in the opposite direction of the water. So, it is a wrong answer.
Option (D) is given as “the skin of an earthworm”.
Moist skin of earthworm is responsible for respiration and it is associated with blood vessels. So, it is a wrong answer.
Hence, options (A), (B), and (D) are incorrect.
Conclusion
Respiratory systems are those systems, which perform the basic function of respiration. They are somehow related to blood supply either directly or indirectly, but the tracheal system of insects is not associated with blood supply.
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Chapter 34 Solutions
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
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