Tunicates

Definition

Tunicates are marine invertebrates belonging to the subphylum Urochordata, characterized by their sac-like bodies. They are filter feeders and exhibit a notochord during their larval stage.

5 Must Know Facts For Your Next Test

1. Tunicates have a notochord only during their larval stage, which is lost in adulthood.
2. The adult form of tunicates has a sac-like body structure with two siphons for water flow.
3. They are commonly known as sea squirts due to their ability to expel water when disturbed.
4. Tunicates are important in marine ecosystems as filter feeders, helping to maintain water quality.
5. Their closest relatives among chordates are vertebrates, making them crucial for understanding the evolution of this group.

Review Questions

Related terms

Notochord: A flexible rod made out of a material similar to cartilage; it provides support in all chordate embryos.

Filter Feeding: A method of feeding where organisms strain suspended matter and food particles from water.

Sea Squirts: Another name for adult tunicates, derived from their ability to expel water forcefully.