Question

Observe slide of Hydra under a microscope. 

Draw the diagram and write your finding.

a) Is the body made of single cell or a group of cells?

b) Did you find any hollow structure inside the body?

c) Did you find any other characters in it?

Answer 1

a) The body of Hydra is made up of number of cells.

b) The hollow structure found inside the body is called coelom or body cavity.

c) 

• The proximal or aboral end is drawn into a slender stalk on the end of which is the basal disc for attachment. 
• The free distal end or oral end bears the mouth which is situated on hypostome. 
• The hypostome is encircled by 6 -10 tentacles. 
• Bud is present at side with a mouth or tentacles like the parent.