Multiple choice

How many tracheal tubes arise from each abdominal spiracle?

  1. Several

  2. 2 tubes

  3. 3 tubes

  4. 1 tube

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

From the atrium of each abdominal spiracle, three tracheal tubes arise. The three tracheal tubes are as follows: 

A. Dorsal tracheal tube B. Ventral tracheal tube C. Lateral tracheal tube