Animal Planet II Ch 19

Question 1

List 5 characteristics found in organisms placed in Phylum Platyhelminthes.

Answer 1

1. Digestive systems incomplete
2. Lack respiratory or circulatory systems
3. Found in fresh water and marine environments
4. Flattened/ribbon like and bilaterally symmetrical
5. Triploblastic acoelomates

Question 2

Name 5 characteristics of phylum Mollusca.

Answer 2

1. Visceral mass & Mantle
2. Bilateral symmetry, with some being asymmetrical
3. Mantle consists of fold, arise from the dorsal body wall & enclose the mantle cavity that often secretes a shell.
4. Complex digestive tract
5. Body cavities are schizocoelomatic

Question 3

Sketch and label the basic external anatomy of a tapeworm.

Answer 3

Question 4

Answer 4

1. Brain
2. Pharynx
3. Heart
4. Seminal Vesicles
5. Crop
6. Dorsal Blood Vessel
7. Gizzard
8. Intestine
9. Seminal Receptacles