Question

Provide appropriate technical terms in the space provided.

a. Blood-filled cavity in arthropods

b. Free-floating form of cnidaria

c. Stinging organ of jelly fishes

d. Lateral appendages in aquatic annelids

• A. Haemocoel
• B. Cnidocyte
• C. Parapodia
• D. Medusae

Answer 1

Answer: (A), (B), (C), (D)

Blood-filled cavity in arthropods

• Haemocoel is the body cavity in arthropods and many other invertebrates.
• The haemocoel contains haemolymph which bathes the body organs.

Final answer: Haemocoel.

Free-floating form of cnidaria

• Medusa is the free-floating form of cnidaria.
• It is shaped like an umbrella.

Final answer: Medusa.

Stinging organ of jelly fishes

• Cnidocytes are the specialised cells present in cnidaria which have stinging purposes.
• It contains an organelle called nematocyst within it, which is predominantly used for prey capture, locomotion and defence.

Final answer: Cnidocyte.

Lateral appendages in aquatic annelids

• Parapodia are the lateral appendages in aquatic annelids.
• Being highly vascular it also plays a role in respiration.

Final answer: Parapodia.