Question

1. Red blood cells contain a red coloured substance called
2. The vein which carries deoxygenated blood is
3.Sponges and hydra do not posses ............
4. In lungs, excretion of
takes place............
5...........and..............are vascular tissues ​

Answer 1

Answer:

1 - hemoglobin

2 - pulmonary artery

3 - circulatory system

4 - carbon dioxide

5 - xylem and phloem