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What is an animal?
-Multicellular heterotrophic organism-Has mobility-Lacks cell walls-Has metabolic stores (energy storage) TERM 2
What is symmetry?
DEFINITION 2 Symmetry is how you cut an organism. TERM 3
What are the (2) types of symmetry?
DEFINITION 3 -Bilateral-Radial-Asymmetry TERM 4
Define both symmetry
DEFINITION 4
- Bilateral sym- only one plain along the major axis result in (2). Example: Lobster and object- shovel- Radial sym- No single left or right side (no matter how you cut it) you're going to end up with mare images- Asymmetry- TERM 5
Explain the early animal development
DEFINITION 5 Zygote - undergoes- Cleavage- cleavage forms- Blastula- blastula forms a hallow hole called ( Blastocoel) - blastocoel undergoes the process of- Gastrulation- gastrulation forms Blastopore and two more layers- Inner (Endoderm) and Outer (Ectoderm) and a space between them called Blastocoel.
Define the following terms: Blastula, Zygote,
Cleavage, Gastrulation, Gastrula.
Blastula- a hollow ball of cells Zygote- a fertilized egg Cleavage- cell division without cell growth Gastrulation- (the process) of the in-folding of the blastula Gastrula- an embryo at the stage following the blastula, when it is a hollow cup-shaped structure having three layers of cells. TERM 7
How to determine the types of animals?
DEFINITION 7 -The cleavage-The Coelom Formation-The fate of the blastopore-The body Cavity TERM 8
What type of cleavage is in Protostome and
Deuterostome development (animal)?
DEFINITION 8 Protostome- Spiral and indetermineDeuterostome- Radial and determine TERM 9
How would you define a Coelom
formation?
DEFINITION 9 This is how the body cavity forms and the third tissue layer (mesoderm) differs between Protostome and Deuterostome. TERM 10
How does Coelom formation form in
Protostome and Deuterostome animals? What
are the names given to them because of the
formation of their mesoderm?
DEFINITION 10 Protostome- The mesoderm forms as a thickening of the cells down near the endoderm and ectoderm.Deuterostome- The mesoderm forms at the top end of the cavity. Second part Protostome- Schizocoelous (mesoderm splits)Deuterostome- Enterocoelous (secondary in-folding of cells at the top of the archenteron).
