Invertabrates Flashcards
Invertebrate
Animal with no backbone
Exoskeleton
Rigid external covering
Endoskeleton
internal skeleton
Vertebrate
posession of backbone
Hermaphrodite
both F and M sex organs
Internal Fertilization
Egg and Sperm, sexual
External Fertilization
Sperm and egg touch on outside of body
Radial Symmetry
Symmetry around central axis, starfish
Bilateral Symmetry
divisible into equal halves
Cephalization
`An evolutionary trend
Coelom
a protective cushion thats filled with fluid
Pseudocoelom
a second body cavity
Acoelomate
an invertabrate lacking a coelom
Protosome
mouth before anus in development
Deuterostome
anus before mouth in development
Sessile
Organisms that are usually attached to something
Cnidocytes
Help organisms catch prey
Ganglion
a big clump of nerve tissues
Regeneration
process of renewal restoration
Hydrostatic Skeleton
flexible skeleton supported by fluid structure
Trichinosis
worms caused by under cooked pork
Open circulatory system
blood suffuses the body rather than being in veins and arteries
Closed circulatory system
Blood that runs through veins and arteries
Crop
tract used for food storage
Gizzards
hind part of the stomach
Clitellum
thickened glandular and non-segmented section of the body
Thorax
includes the rib cage, which encloses the heart and lungs
Abdomen
The region of the body in between the thorax and the pelvis
Cephalothorax
a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind
Molting
an animal routinely casts off a part of its body
Mandibles
Lower jaw of a vertabrate
Tracheal Tubes
Gets good airflow in the throat
Book lungs
used for atmospheric gas exchange
Spiracles
a breathing hole
Malpigian Tubules
nsects, myriapods, arachnids, and tardigrades. The system consists of branching tubules extending from the alimentary canal that absorbs solutes, water, and wastes from the surrounding hemolymph.
