Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

The tracheal tubes of insects carry _______ to tissues deep inside the body.

  1. a. hemolymph
  2. b. blood
  3. c. air
  4. d. water

Summary Introduction

Concept introduction: Insects will not breathe through their mouths as mammals. Insects do not have lungs and their blood is a watery, yellowish liquid. Instead of lungs, insects have a system of tubes called tracheae. Tracheae penetrate right through the insect’s body.


Reason for the correct answer:

Air enters the respiratory system of insects through a series of external openings called spiracles. The spiracles act as muscular waves in some of the insects. It then leads to a densely-networked array of tubes in the internal respiratory system called the tracheae.

Option c. is given as “air”. As the tracheal tubes in insects carry air to their tissues and organs, option c. is correct.

Reasons for the incorrect answers:

Option a. is given as “hemolymph”.

Hemolymph is the circulating blood of insects that moves through the open circulatory system, directly to the tissues and organs...

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