Chapter 1 Flashcards
Chordata big 4
- Notochord
- Dorsal hollow CNS
- Postnatal tail
- Endostyle
What is an endostyle
Glandular groove in floor of pharynx
Taxonomic relationship of chordates and vertebrates
Kingdom Animalia
Phylum chordata
Subphylum urochordata
Subphylum cephalochordata
Subphylum craniata
Hagfish
VertebrataWhat animals have a notochord in embryo stage
Chordates
Chordates with a braincase
Craniates
Chordates with vertebrae
Vertebrates
What appears during embryonic development after the notochord has formed and replaces the notochord functionally
Vertebrae
3 components of craniate body
Head, trunk, and postnatal tail
What does the trunk contain
Cavity, coelom, body wall
Begins postanally
Present in all embryos
Variably reduced in different vertebrates
Tail
Vital region of all vertebrate embryos
Gives rise to respiratory structures, jaw components, endocrine glands, auditory components, initial immune cells
Pharynx
Tissue column that separate each pharyngeal slit or pouch and contain:
Supportive skeletal elements
Striated muscles to operate the arch
Cranial nerve branches
An aortic arch connecting dorsal and ventral aortas
Pharyngeal arches
Neutral tube formation process
Neurulation
Cranial and spinal nerves connecting CNS with various organs and tissues
PNS
Viscera and gut component
Open area with 2 compartments; upper and lower
Coelom
Front to back seperation
Cross section
Top to bottom seperation
Frontal
Left to right seperation
Saggital
Serial repetition of body structure
Metamerism
Duterosome development Big 4 Bilateral symmetry Cranium that surrounds brain 3 part brain Neural crest Paired external sense organs Cartilage
Craniates
Vertebral column
Semicircle cahals (cochlea and inner ear)
Electroreception
Lateral line sym
Vertebrates
Notochord appears first dorsal to alimentary canal
Craniates
Neural arch and health arch
Vertebrates
Muscles attach from one vertebrate to another
Articulation
Vital, present in all embryos, gives rise to respiratory structures
Invaginations
If it makes it to outside- gill slits
Pharynx
Groove sinks and fuses- epithelium heals over this structure
Info comes in by nerves and out to glands and muscles
Dorsal hollow CNS
Have notochord but no vertebral column
Parachordates
Expansion of brain over time and greatest in all craniates
Cephalization
Pectoral and pelvic, connected with trunk
Variably reduced or never developed in some vertebrates
Appendages
3 parts of brain
Forebrain
Midbrain
Hind brain
Has jaw components, endocrine glands, auditory components, and initial immune cells
Pharynx
Tissue column that separate each pharyngeal slit or pouch and contain
- supportive skeletal elements
- striated muscles to operate the arch
- cranial nerve branches
- an aortic arch connecting dorsal and central aortas
Pharyngeal arches
