BIO 2135 Lecture Notes - Lecture 9: Myriapoda, Indian Railways, Red Blood Cell
28 Sep 2016
School
Department
Course
Professor
Document Summary
Ecdysis: moult the whole of the structure in one shot: animals are gong to become vulnerable as it escapes from the cuticle, going to harden it up very quickly. Saccate metanephridia: modified nephridia (filtering system: capable of absorbing the fluid from the hemocoel, no ceolomic space but still have fluid filled cavity. The position of the n-acetyl group of the glucose sugar gives polarity to the structure. Alpha-chitin: each of he chitin molecule is aligned head to tail to the one adjacent to it (anti-parallel) strands. With lots of hydrogen bonding, the alpha chitin interaction between the molecule is very strong and tough. Beta chitin: the bumps sitting on the hollows of the other molecule. Articulated limbs (the reason why they are named arthropods: limbs are now tubular structures made out of chitins. Exoskeleton with articulated plates: body is never just solid skeleton: there is always membranous cuticle between the plates.
