Bauplane Body Types Flashcards
What is the Bauplane concept?
A basic pattern of organization in an animal that is related to a particular complexity of arrangement/life history.
Which body type lacks true tissues?
Ablastic
What phyla is Ablastic in nature?
“Porifera” (e.g. Sponges)
Cnidaria has what tissue construction?
Diploblastic
Which layers of tissue are in diploblastic?
ectoderm and endoderm
What is the most complex tissue construction?
Triploblastic
List the coelom constructions
Acoelomate, Pseudocoelomate, and (Eu)coeloomate
Describe Acoelomate, list example of phyla with it
No cavity is present, Platyhelminthes (flatworms)
Which coelom construction has a space between mesoderm and endoderm?
Pseudocoelomate.
Give an example of a phyla with pseudocoelomate
Nematoda, i.e roundworms
Which coelom construction has a space between the mesoderm?
(Eu)coelomate
Annelida (i.e. earthworm) has what type of coelom construction?
(Eu)coelomate
Why develop a coelom?
The coelom separates functions between the locomotive section and the digestion section.
What is the classical progression of the coelom construction from simple to complex?
Acoelomate —-> Pseudocoelomate —-> (Eu)coeloomate
In the (Eu)coelomate, which layer of mesoderm is the locomotor muscles? The digestive muscles?
the outer mesoderm layer is the locomotor muscle and inner layer towards the endoderm is the digestive muscle.
Progression of the coelom is _______?
Functional, not linear
Why did the acoelomate condition evolve?
It is needed for locomotion
why did the pseudocoelomate condition evolve?
The pseudocoelom was evolved because it is typically present in parasites. They use the host for the digestive gut movement process and thus don’t one
Where would you find the pseudocoelomate?
Between the mesoderm and endoderm.
List the types of symmetry associated with body types
Asymmetry, Radial Symmetry, and Bilateral symmetry
What type of symmetry has no true axes? How do you describe this symmetry?
Asymmetry, deep and superficial
What phyla has no true axes?
“Porifera” (e.g. sponges)
How many axes does Radial symmetry have?
One plus amounts of axes
Phylum Cnidaria (e.g. jellyfish) have what type of symmetry? How is that described?
radial symmetry, umbrellar (aboral) and subumbrellar (oral)
Head leads the way (cephalization) in what type of symmetry?
Bilateral symmetry
Describe bilateral symmetry
1 axis only, Head leads the way, motile creatures
Give an example of a bilateral symmetric species?
Flatworms (e.g. phylum platyhelminthes)
Planes of bilateral symmetry
Transverse plane, sagittal plane, midsagittal plane, frontal plane, and oblique plane (not orthogonal to the body)
Midsagittal plane cuts from ____ to ____, usually _____ of a body.
dorsal to ventral, down the middle
Nostrils are _____ to the eyes. Eyes are ______ to the nostrils.
medial, lateral
Eyes are _____ to the mouth. The mouth is _____ to the eyes.
dorsal, ventral
Fingers are ______ to the elbow. Elbows are _____ to the fingers.
distal, proximal
Starfish directional terminology is….?
Aboral and oral
Animals with no appendages but radial symmetry are directionally termed?
deep and superficial
