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Definition
| Projections into the vestibule of Amphioxus (Feeding organ that creats water current into mouth) |
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Definition
| A pharynx that is perforated by openings to either the exterior or an atrium. |
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Definition
| Where respiratory water is deposited |
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Definition
| Oxygen depleted water is ejected via an atriopore |
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Definition
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Definition
| One of a series of muscle segments |
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Definition
| Midventral mucus-producing organ groove in pharynx of Protochordates; homologue of Craniate thyroid. |
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Definition
| Protochordates' hepatic organ; homologue to liver |
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Definition
| Cord-like skeleton of the back |
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Definition
| Thin walled chamber in the heart receiving venous blood; partially incorporated into the atrium or serving as SA node in amniotes. |
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Definition
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| Opening in a turnicate (Urochordata) for the entrance of water |
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Definition
| Opening in a turnicate (Urochordata) for the exit of water |
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Definition
| Pigmented light-sensitive organ in Amphioxus. |
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Definition
| A small organ of balance and orientation is some aquatic invertebrates, consisting of a sensory vesicle or cell containing statoliths |
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Definition
| Site of attachment in metamorphosing sea squirts |
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Definition
| Diverticulum of the foregut extending into proboseis in acorn worms |
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Definition
A mature haploid male or female germ cell that is able to unite with anoter of the opposite sex in sexual reproduction to form a zygote
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Term
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Definition
| Multicellular anomals with differentiated tissues |
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