Describe two structures that allow arthropods to breathe air.

Answers and explanations:

1. Book lungs.  

Book lungs are stacked tissues with air pockets where gases are exchanged (i.e., between blood and air)  

2.Trachea.

The trachea is a system of tubules that take air through structures known as spiracles. These tubules can carry oxygen directly to tissues throughout the body  

i believe it would be the lungs.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.