5. What does the digestive system do?
1. Obtaining food
2. Mechanically breaks good down into smaller particles
that facilitate the activity of digestive enzymes.
3. Enzymatic breakdown of larger food molecules into
molecules that can enter the hemolymph.
4. Produce molecules that coordinate feeding and other
digestive activities
20. Absorption of digested material
Movement of H20
Movement of water, inorganic ions, sugars & amino acids
caecum
Malpighian
tubule
21. Fat Body
Functions of fat body
- metabolism of carbohydrates, lipids and nitrogenous compounds
- storage of glycogen, fat and protein
- regulation of blood sugar
-synthesis of major hemolymph (blood) proteins
(haemoglobins, vitellogenins, storage proteins)
22. Fat Body
Functions of fat body – changes with needs – e.g. calliphorin
10
5
0
Amountofcalliphorininhemoglobin
~7
~3
~.03
23. Fat Body – cell types
Trophocytes
-carry out most of
functions of fat body
Urocytes
- storage of urates/uric acid
