Solution:
The respiratory system consists of a network of trachea, that open through 10 pairs of small holes called spiracles present on the lateral side of the body.
Ostia - Heart
Malpighian tubules - Junction of midgut and hindgut
Seminal vesicles - 6th and 7th abdominal segments; Genital pouch - 9th and 10th abdominal segments.