Lecture 23: Ecdysozoa Flashcards
1
Q
Ecdysozoa?
A
Ecdysis
2
Q
Ecdysis?
A
Process of moulting cuticle
3
Q
Cuticle is made of?
A
chitin
4
Q
Sclerotized cuticle?
A
Hardened
5
Q
Unsclerotized cuticle?
A
flexible, allows for movement
6
Q
What secretes substances that form cuticle?
A
Epidermis
7
Q
Cuticle layers?
A
Endocuticle
Exocuticle
Epicuticle
8
Q
Apolysis?
A
inactive moulting fluid secreted by epidermis Thin protective layer deposited Endocuticle digested Liqueified product taken by epidermis sclerotized exocuticle not digested
9
Q
Ecdysis process?
A
moulting fluid reabsorbed
•epicuticle (wax layer) laid down
•shed old exocuticle and epicuticle
10
Q
Phylum nematoda traits?
A
Roundworms/ threadworms
Must moult cuticle
Pseudocoelomate
Free living and parasitic
11
Q
Eutelic?
A
post-embryonic growth occurs by each cell growing, not by addition of cells
