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Major Features of Body Plans in Animals - Coggle Diagram
Major Features of Body Plans in Animals
Body cavities
Most are triploblastic
A
true body cavity
is called
a celom
it comes from the mesoderm
Coelomates are animals that posses a true coelom
Examples of body cavities
Pseudocoelom
Have false body cavity/structure,. kind of open
Ex. Round worms
Ceolamtes
True cavity that have fluid that are going to cushion suspended organs so organs can grow and move independently
Acoelomate
Have no body cavity
Ex. Flat worms
Symmetry
Radial
Shows more of our permeative species aka ancient
Because of sessile organism which mean it stays fixed to one spot
Ex. jelly fish
Platctanic drifting which just floats on the surface of the water
Doesn't have active movement
Bilateral
Have highly developed nervous and muscle systems
Has active movement
Has a dorsal and ventral side
Has an anterior and posterior side
Protostome & Deuterostome Development
Protostome Development
Ex. Molluscs (snails), annelids (insects)
Coelom formation aka a cavity
After the invagination you get a formation of a second cavity known as an Archenteron
There is a variation in the position of this pouch which will eventually become the digestive system
The mesoderm is also placed in a different location
Solid masses of mesoderm splits and form coelom
Cleavage
@ the eight-cell stage
Its
spiral and determinant
cells which means the fate of each cell is predetermined
Fate of the blastopore
Mouth forms from the blastopore
1st mouth
Deuterostome development
Ex. echinoderms (starfish), chordates (us)
Fate of the blastopore
The anus develops from the blastopore
Coelom formation aka a cavity
After the invagination you get a formation of a second cavity known as an Archenteron
There is a variation in the position of this pouch which will eventually become the digestive system
The mesoderm is also placed in a different location
Folds of archenteron from coelom
Cleavage
@ the eight-cell stage
Its
radial and indeterminate
so at this stage each cell retains the capacity to develops a completely separate embryo usually get the identical twin
2nd mouth
Tissue
Triploblastic
3 germ layer
During developent, 3 germ layers give rise to the tissue and organs of the animal embryo
Endoderm (inner layer)
Thyroid cell
Pancreatic cell
Lung cell (alveolar cell)
Mesoderm (middle layer)
Skeletal muscle cells
Tubule cell of the kidney
Cardiac muscle
Smooth muscle (in gut)
Red blood cells
Ectoderm (outer layer)
Neuron of brain
Pigment cell
Skin cells of epidermis
Are bilateral symmetry
Diploblastic
Develop from 2 germ layers
Sponges and jelly fish only have 2 layers
Sponges lack pro tissues, they are asymmetrical
Jelly fish are nidarans
Endoderm (inner layer)
Thyroid cell
Pancreatic cell
Lung cell (alveolar cell)
Ectoderm (outer layer)
Neuron of brain
Pigment cell
Skin cells of epidermis