الإنجليزية - الإنجليزية
تعريف tunicata في الإنجليزية الإنجليزية القاموس.
- tunicates
- The body is usually covered with a firm external tunic, consisting in part of cellulose, and having two openings, one for the entrance and one for the exit of water
- The pharynx is usually dilated in the form of a sac, pierced by several series of ciliated slits, and serves as a gill
- A grand division of the animal kingdom, intermediate, in some respects, between the invertebrates and vertebrates, and by some writers united with the latter
- They were formerly classed with acephalous mollusks