Introduction to the CHORDATES
Honors Biology Chapter 25 & 26 & Biology Chapter 25 & 26
Introduction to the CHORDATES
Kingdom: Animalia Phylum: Chordata
4 Basic Characteristics of Chordates
? (Some of these characteristics may not be present entire life cycle of animal!) 1. Dorsal, hollow nerve cord = central communication cable
Ex. Spinal cord
2. Notochord = long support rod below nerve cord (in embryos) Ex. May change to vertebrae
4 Basic Characteristics of Chordates (cont.)
3. Pharyngeal Pouches = paired sacs in throat region
Ex. Become gill slits in some animals
4. Tail = section of body that extends beyond anus
What Is a Chordate? ? Characteristics of Chordates
Muscle segments
Notochord Hollow nerve cord
Tail
Anus
Pharyngeal pouches
Mouth
Chordate Characteristics
Muscle segments
Notochord
Dorsal Hollow Nerve Cord
Brain
Postnatal Tail
Anus
Mouth
Pharyngeal Pouches/Slits
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