Platyhelminthes

Question 1

Members of the Phylum Platyhelminthes characteristics

Answer 1

• all are multicellular
• are triploblastic
• are acoelomate because they do not have a coelom
• ## body is flattened Dorsiventrally

Question 2

Structure of platyheminthes

Answer 2

• adapt to an inactive lifestyle by having an alongated, flattened body with specialised, sensitive head at the front
• the head has a concentration of nerve cells, which is known as cephalisation
• the animals are bilaterally symmetrical which enables flat works to move
• a flat worm has a top dorsal side and bottom ventral side
• Some flatworms live entirely parasitically while others are free living in water, move fast and take in food via mouth

Question 3

What is a Acoelomate

Answer 3

Animal without a body cavity

Question 4

Doris- ventral

Answer 4

The animal has a top and a bottom surface

Question 5

What is a scolex

Answer 5

Small pear- shaped front end of a tapeworm with hooks and suckers for attachment to the host