Amphioxus ID
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55 terms
Terms | Definitions |
|---|---|
 anus |  |
| atriopore |  |
| atrium |  the large cavity surrounding the pharynx |
| atrium |  the large cavity surrounding the pharynx |
| branchial rods |  structures that provide support to the gill bars. |
| buccal cirri |  Twenty two-stiff tentacle-like structures |
| buccal cirri |  a number of these, cut transversely, are present at the lower boundary of the vestibule |
| cardinal vein |  present close to the midpoint of the medial border of the gonads. bright pink coloration. |
| caudal fin |  |
| caudal fin |  |
| dorsal aorta |  |
| dorsal aorta |  |
| dorsal aorta |  |
| dorsal fin |  a short projection supported by the gelatinous fin rays |
| dorsal fin |  |
| endostyle |  The deeply grooved structure in the floor of the pharynx. It contains both ciliated and glandular cells |
| epidermis |  |
| epipharyngeal groove |  |
| eye spot |  Very small, dark brown/back mass of pigment cells located at the anterior end of the nerve cord |
| fin rays |  internal connective-tissue rods that are present as support structures |
| fin rays |  internal connective-tissue rods that are present as support structures |
| gill bar |  Make up the side wall of the pharynx |
| gill slits |  separate gill bars |
| gill slits |  separates gill bars |
| gonad |  ovary or testes (stain blue). A mass of very small spots |
| hepatic diverticulum |  the hollow, oval-shaped structure that lies within the atrial cavity |
| hepatic diverticulum |  |
| intestine |  large, hollow, oval structure lying ventral to the unpaired dorsal aorta |
| intestine |  |
| metapleural folds |  |
| metapleural folds |  |
| mouth |  the small opening in the velum |
| myomeres |  masses of muscle under the skin |
| myomeres |  masses of muscle under the skin |
| myosepta |  connective tissue partitions |
| nerve cord |  |
| nerve cord |  |
| notochord |  |
| notochord |  |
| ocelli |  a linear series of dark brown pigment cells lying along the ventral wall of the nerve cord. |
| oral hood |  Funnel shaped membrane located at the ventral part of the anterior end of the body |
| pharynx |  the organ chamber extending from the mouth to the intestine |
| pharynx |  the organ chamber |
| rostrum |  |
| subintestinal vein |  |
| tail |  |
| transverse muscle |  |
| velar tentacles |  short projections |
| velum |  the vertical membrane located just behind the base of the wheel organ. May regulate the amount of water entering the pharynx |
| ventral aorta |  |
| ventral fin |  |
| ventral fin |  |
| vestibule |  the funnel-shaped cavity enclosed by the oral hood |
| vestibule |  the funnel-shaped cavity enclosed by the oral hood |
| wheel organ |  a series of finger like projections |
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