Animals Tutorial I Flashcards
(21 cards)
Phylum Cnidaria refers to specialized cells called
Cnidocytes
Stinging structures within cnidocyte cells
Nematocysts
Symmetry of cnidaria
Radial
How many germ layers do cnidaria have?
2
What are the germ layers of cnidaria?
Epidermis, and inner gastrodermis
Two body forms of cnidaria
Polyp, medusa
Polyp body form characteristics
Tubular organism closed at one end with a mouth surrounded by tentacles at the other end
Medusa body form characteristics
Jellylike, umbrella-shaped, free-swimming organism with mouth at the end of a central projection called the manubrium
Two layers of cnidaria held together by thin layer called the
Mesoglea
Function of cnidaria tentacles
Capture food
Gas exchange in cnidaria
Diffusion across body surface, as cells are diploblastic
Type of cnidaria reproduction
Asexual budding
Production of gametes in cnidaria occurs in either
Spermaries or ovaries, which are projection off body wall
Symmetry of platyhelminthes
Bilateral
How many germ layers in platyhelminthes
Three, triploblastic
Cell layers of platyhleminthes
Gastroderm, Epidermis, and Parenchyma tissue in between
Type of digestive tract in Dugesia (platy)
Blind, meaning there is only one opening
Function of oral sucker in platyhelminthes
Suck in tissue fluids
Function of gastrovascular system in platyhleminthes
Transport nutrients
Unique respiratory organs in arthropods
Tracheal system
Describe tracheal system.
Air enters through spiracles into tracheae. Tracheae branch into tracheoles to reach individual cells for gas exchange
