Which labels best complete the diagram?
X: Two-chambered heart
Y: Swim bladder
X: Single-chambered heart
Y: Swim bladder
X: Gills
Y: Lateral line
X: Lungs
Y: Lateral line
![Which labels best complete the diagram X Twochambered heart Y Swim bladder X Singlechambered heart Y Swim bladder X Gills Y Lateral line X Lungs Y Lateral line class=](https://us-static.z-dn.net/files/d8c/995804b40b550c5c6ec9cc8201c41fea.png)