Question

For each phylum, list the characteristics;

7.) Arthropods

Environment:

Level of organization (e.g. porifera = cellular):

Body symmetry:

Germ layers:

support system:

Nervous system:

Digestive system:

Circulatory system:

Respiratory system:

Excretory System:

Other Distinguishing Features:

For each phylum, list the characteristics:

9.) Chelicerates

Environment:

Level of organization (e.g. porifera = cellular):

Body symmetry:

Germ layers:

support system:

Nervous system:

Digestive system:

Circulatory system:

Respiratory system:

Excretory System:

Other Distinguishing Features:

Answer 1

Characteristics	Arthropods	Cheliceratus
Environment	Aquatic terrestrial and arial forms	Marine
Level of organization	Organ system	body is divided into head, thorax and abdomen.
Body symmetry	Bilaterally symmetrical	Segmented in two ahead of mouth and pedipalps from segment three.
Germ layers	Triploblastic means Ectoderm, endoderm and mesoderm	They have very small coloem. Triploblastic
Support system	Locomotion is takes place by jointed appendages	Locomotion is takes place by first pair of appandages.
Nervous system	Annelidian type and consist of brain and ventral nerve cord.	A pair of nerve cord, brain formed by ganglion per segment and fusion of the ganglia behind the mouth.
Digestive system	complete, straight and well developed.	Guts are narrow to take solid food.
Circulatory system	It is open type means blood vessels are absent and blood directly transfer to body chambers. Blood is colourless.	Arteries directly supplies blood to the other body parts. They have open ends instead of joins directly to the veins.
Respiratory system	Respiration takesplace by general body surface or gills or booklungs in Arachinda.	Have both book lungs and trachea helps to remove oxygen and waste gases from body.
Excretory system	Takesplace through malphigian tubules or green glands or vocal glands.	They have nephrosis which excretes urine. They have malphigian tubules through whic filters blood wastage.
Other distinguishing characteristics	Development may be direct or indirect. Fertilization is internal or external. Unisexual	They have both compound eyes. Fertilization is internal or external.