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Flashcards in Excretion And Osmoregulation Deck (9)
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1

What are the three forms of excretion?

Ammonia (lots of water)
Urea (some water)
Uric acid (excreted dry)

2

What are the three basic conditions of the hindgut?

General condition
Liquid feeder
Water stress

3

What structures carry oxygen to the tissues and CO2 away?

Trachea

4

How does air enter into the insect?

Spiracles

5

What are taenidia?

Spirally arranged cuticular thickenings designed to keep trachea open

6

What is the most metabolically active tissue?

The house fly brain

7

What are the four patterns of spiracle placement?

Holopneustic

Hemipneustic (short bodied, spiracle number reduced)

Metapneustic/oligopneustic: single spiracle at tip of abdomen

Apneustic: no spiracles

8

What are Ostia?

Vertical slits in the heart where blood is drawn in under negative pressure

9

Is oxygen carried in the blood?

No it’s carried in the trachea