Craniate Characteristics

Question 1

Parts of tripartite brain

Answer 1

Anterior-smell, midbrain-sight, hindbrain-balance

Question 2

Neurogenic + lens placodes associated with the special senses, form by invagination of the ectoderm into mesoderm

Answer 2

Ectodermal placodes

Question 3

Unique embryonic tissue, arises from ectoderm alongside developing neural tube

Answer 3

Neural crest

Question 4

Ectodermal placodes

Answer 4

Neurogenic + lens placodes associated with the special senses, form by invagination of the ectoderm into mesoderm

Question 5

Expansion of anterior end of dorsal hollow nerve cord

Answer 5

Tripartite brain

Question 6

Composed of hydroxyapatite around a mesh of collagen fibers

Answer 6

Bone

Question 7

Neural crest

Answer 7

Unique embryonic tissue, arises from ectoderm alongside developing neural tube

Question 8

Protective case of cartilage and/or bone around the brain.

Answer 8

Braincase

Question 9

Structures formed by neural crest

Answer 9

Nerve ganglia, pigment cells, dentine, pharyngeal skeleton, adrenal medulla

Question 10

Bone

Answer 10

Composed of hydroxyapatite deposited around a mesh of collagen fibers

Question 11

List unique Craniate characteristics

Answer 11

Ectodermal placodes, tripartite brain, neural crest, bone, braincase