Hydra does not have specialised organs for circulation. Oxygen and food are diffused into the body and undigested material is diffused out.
Question
How are oxygen and food circulated in Hydra?
- Transportation in animals and plants CBSE Class 7
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Open Answer »Read the following terms given below.
| root hairs | Xylem | Urethra |
| arteries | Kidneys | Veins |
| atria | Capillaries | Heart |
| ureter | Phloem | Urinary bladder |