Crustacea.
![Picture](/uploads/1/3/9/7/13974932/1325121.jpg?459)
1) "Crusted Forms" - hard flexible crust.
2) Nearly all are aquatic - "Insects of the Sea."
3) Head and trunk (often divided into thorax and abdomen).
4) Nearly all are suspension filter-feeders.
5) Larger species are predator/scavengers.
6)Appendages specialized for cutting, tearing, and collecting.
7) Forgut enlarged into cardiac pyloric stomach.
8) Midgut bears into digestive glands.
-comprised of highly branched, blind canals.
-secret enzymes.
-absorb nutrients.
-stores glycogen and fat.
9) All crustaceans have gills.
*Heart--> dorsal vessel--> sinuses--> gills--> pericardial sinus--> ostia it heart.
10) Eye types:
*Median simple eye (naupliar - from nauplius larvea).
*Compound eyes - ommatidia.
2) Nearly all are aquatic - "Insects of the Sea."
3) Head and trunk (often divided into thorax and abdomen).
4) Nearly all are suspension filter-feeders.
5) Larger species are predator/scavengers.
6)Appendages specialized for cutting, tearing, and collecting.
7) Forgut enlarged into cardiac pyloric stomach.
8) Midgut bears into digestive glands.
-comprised of highly branched, blind canals.
-secret enzymes.
-absorb nutrients.
-stores glycogen and fat.
9) All crustaceans have gills.
*Heart--> dorsal vessel--> sinuses--> gills--> pericardial sinus--> ostia it heart.
10) Eye types:
*Median simple eye (naupliar - from nauplius larvea).
*Compound eyes - ommatidia.