Are annelids amphibians?
Asked by Priyanka
| 30th Oct, 2014,
09:56: PM
Expert Answer:
Annelida and Arthropoda are two separate phyla that belong to the Kingdom Animalia.
Characteristics of phylum annelida:
- The body is cylindrical and divided into ring-like segments. In each segment, there is representation of different organ systems.
- Have a well-developed digestive system with an alimentary canal open at both the ends. It consists of mouth and anus.
- Have a true body cavity called coelom, present between the body wall and the digestive tube. It is filled with coelomic fluid.
- The body cavity is lined with coelomic epithelium.
- Presence of thin and moist layer called cuticle on the body.
- Examples – Earthworm, leech, nereis
Characteristics of phylum arthropoda:
- They have jointed limbs, one pair each on some or on all body segments.
- They have an exoskeleton made of chitin. They cast off their exoskeleton during growth in early life, which is regrown. The casting off and the exoskeleton is collectively called moulting.
- They have a complex muscular system, with exoskeleton for attachment, striated muscles for rapid actions and smooth muscles for visceral organs. Lack cilia.
- Sense organs consist of well-developed eyes, gustatory organs, antennae, balancing organs and auditory organs.
- Excretory organs are Malpighian tubules or green glands.
- Examples – Crab, spider, mosquito, butterfly
Annelida and Arthropoda are two separate phyla that belong to the Kingdom Animalia.
Characteristics of phylum annelida:
- The body is cylindrical and divided into ring-like segments. In each segment, there is representation of different organ systems.
- Have a well-developed digestive system with an alimentary canal open at both the ends. It consists of mouth and anus.
- Have a true body cavity called coelom, present between the body wall and the digestive tube. It is filled with coelomic fluid.
- The body cavity is lined with coelomic epithelium.
- Presence of thin and moist layer called cuticle on the body.
- Examples – Earthworm, leech, nereis
Characteristics of phylum arthropoda:
- They have jointed limbs, one pair each on some or on all body segments.
- They have an exoskeleton made of chitin. They cast off their exoskeleton during growth in early life, which is regrown. The casting off and the exoskeleton is collectively called moulting.
- They have a complex muscular system, with exoskeleton for attachment, striated muscles for rapid actions and smooth muscles for visceral organs. Lack cilia.
- Sense organs consist of well-developed eyes, gustatory organs, antennae, balancing organs and auditory organs.
- Excretory organs are Malpighian tubules or green glands.
- Examples – Crab, spider, mosquito, butterfly
Answered by Hemangi Binny
| 31st Oct, 2014,
07:11: AM
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