exam 5 Flashcards
(42 cards)
Multicellularity?
Many have complex bodies
Heterotrophy?
Obtain energy and organic molecules by ingesting other organisms
Active movement?
Move more rapidly and in moe complex ways
Connextive tissues?
Cells embedded in an extraceullar matrix
Eppithelial tissues?
Covers, lines, protect and secrete
Nervous tissue?
Coordinate movement
muscle tissue?
Power locomotion
Bilateral Symmetry?
Half and half
Radial symmetry?
6 portions of symmetry
Asymmetry?
No matching portions
porifera characteristics?
No true tissues
Sponges have no digestive, respiratory, circulatory, reproductive or nervous system
Asymmetrical
Adults are sessile but larvae have motility
Cnidaria characteristics?
Diploblastic - Endoderm and ectoderm
Radial symmetry
Contain specialized cells called cnidocytes that contain nematocysts
One opening that serves as mouth & anus
Platyhelminthes characteristics?
Hermaphroditic (can be male & female)
No organs for circulation or gas exchange
No complete gut, only a mouth
Flame cells, is the primitive excretory system.
Lophotrochozoa characteristics?
A lot of the lophotrochozoans have a lophophore. Which are used to filter feed and used in gas exchange
A lot of a larval form called a trochophore larvae.
Nemertea characteristics?
A stickty proboscis can be everted from the anterior end of the body and wrapped around a small animal.
A coelomic space (rhynchocoel) surrounds the proboscis
Rotifera characteristics?
Multicellular, aquatic, microscopic animals with a characteristic crown of cilia on their anterior end that beat rapidly during swimming and feeding.
Flame cells remove excess water
Complete digestive tract, nervous system and sense organs.
Eyespots
Mollusca characteristics?
Body plan mantle, secretes shell, muscular foot, visceral mass
Complete digestive system, gills, circulatory system
Has radula, nephridia (nitrogen waste removal), and have a trochophore larva stage
Annelida characteristics?
Segmented, ringlike segments, bristles of chitin, locomotion
Ventral nerve cord
Brachiopoda characteristics?
Have 2 calcified shells
Dorsal and ventral
Lophophore lies on body in-between shells.
Ecdysozoa?
external covering called cuticle that molts - ecdysis
Nematoda characteristics?
Pseudocoelomates
Many are parasitic, bilaterally symmetrical & unsegmented
Covered by cuticle
Stylets, pharynx & anus
Arthropoda characteristics?
Segmentation, exoskeleton, jointed appendages, compound eyes in many arthropod’s, other have simple eyes or ocelli.
Terrestrial insects and some other use Malpighian tubules.
Urochordata characteristics?
Tunicates and salps are marine animals.
larvae are tadpolelike and have notochord and nerve cord
Adults lose the tail and notochord
Many secrete a tunic (cellulose sac) that surrounds the animal.
Chordata characteristics?
All chordates possess the following characteristics at some point in life:
Dorsal hollow nerve cord, notochord, post anal tail and pharyngeal gill slits.
