crustaceans Flashcards
what is the body plan of a crustacean
it has a cephalon (head) and trunk (body) but has tagmosis, has an abdomen, and has plepods for swimming and carrying eggs
how many appendages does the head have, and what are they called
5, 1st and 2nd antenna, mandibles, and 1st and 2nd maxilla
how many segments does the malacostracan have and how are these divided
19-21 segments, divided into 6 cephalic, 8 thoracic, 6/7 pleon and telson
what type of eyes do malacostracans have and how are they set
compound, and are either stalked or sessile
what type of feeding style do crustaceans have
have almost every feeding style known
how many segments of gut do crustaceans have and what are they called
- foregut, midgut and hindgut
what type of gland does the digestive system in crustaceans have
a digestive gland or digestive ceca
what type of heart do crustaceans have
a dorsal heart with ostia
what does crustacean blood contain and what colour is it
contains amoeboid cells called haemocytes involved in innate immunity and clotting. the colour is blue
do crustaceans have gills
most of them yes, however some smaller ones do not
what type of excretion release to crustaceans have
ammonotelic, where they release ammonia through either nephirdia or gills
what type of nervous system do crustaceans have
a segmented nervous system
what are the parts in a crustaceans nervous system
paired ventral nerve cords, segmental ganglia, brain dorsal and is composed of 3 ganglia
what are the 3 ganglia called in crustaceans and where are they
protocerebrum (from eyes), deuterocerebrum (from 1st antenna), and tritocerebrum (from 2nd antenna)
where are the sensory receptors on crustaceans
on the setae
