Gastrulation
The cell layer that the muscles develop from
Mesoderm
Sea stars and sea urchins belong to this phyla.
Echinodermata
What do flatworms, Platyhelminthes, use for the excretory system?
Flame Cells
This type of symmetry means that an organism can only be divided one way to produce to equal halves.
Bilateral
How many chambers do most fish have in their heart?
Two Chambers
The _____ is the layer of cells that form between the endoderm and ectoderm.
Mesoderm
Do leeches belong to the phylum Arthropoda?
No! Dragonflies, Lobsters, and Spiders do though.
What is the name of the snail's tongue like organ that helps it scrap or cut its food?
Radula
This side of a bilateral animal is the side in which the stomach is located.
How many chambers are found in reptiles hearts?
Three Chambers
This is the outermost layer of the gastrula that forms the integumentary system of an organism.
Ectoderm
T or F: Frogs, Salamanders, and Toads are considered reptiles.
False: They are amphibians
Which arthropod body part is used in their excretory system?
Malpighian Tubules
Anterior and Posterior
What do echinoderms use for their circulation?
Water Vascular System
What phylum do snails, squid, clams, and slugs belong to?
Mollusca
Which type of organism does not have a body cavity?
Acoelomates
What is radial symmetry?
When an organism can be divided in multiple different ways to create two equal parts.
Ex. Star fish
Closed Circulatory System
Describe the stages of animal development from fertilization to the gastrula stage. Include the three tissue layers of the gastrula.
Fertilization (zygote), cleavage, blastula, gastrula
ectoderm, mesoderm, endoderm
Earthworms, leeches, and polychaetas belong to which phyla?
Annelida
What is a marsupial? Give three examples.
A mammal that gives live birth in the uterus and then continues to develop in a specialized external pouch.
Ex. Opossum, Kangaroo, Koala, Wombat, Tasmanian Devil
If the venomous spurs of a platypus are found on it's hind legs on the bottom, how would biologists describe where they are located anatomically?
On the ventral posterior side of the platypus
How many chambers do sharks have in their hearts?
Two Chambers