5 Questions
Where is the nerve cord situated in chordates?
Dorsally
What is the main characteristic feature of chordates?
Presence of a dorsal notochord
Which direction does the blood circulation run in chordates?
Posterior to anterior ventrally and from anterior to posterior dorsally
What is the special body region situated posterior to the anus in chordates?
Postnatal region
What do chordates share with non-chordates as common features?
Bilateral symmetrical segmentation
Study Notes
Chordate Characteristics
- In chordates, the nerve cord is situated dorsally, above the notochord, and runs along the length of the body.
- The main characteristic feature of chordates is the presence of a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
- In chordates, the blood circulation runs in a double circulation pattern, where oxygenated blood from the heart runs anteriorly and deoxygenated blood runs posteriorly.
- The special body region situated posterior to the anus in chordates is the post-anal tail.
- Chordates share with non-chordates the common features of bilaterally symmetrical body, segmental organization, and coelom.
Test your knowledge of the main characteristic features of animals belonging to the phylum Chordata, including the presence of dorsal notochord and other defining traits. This quiz is based on lectures notes in comparative anatomy.
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