name largest phylum and give features
Answers
Hi there ☺ ,
✋
I would ❤ to answer your question ,
And here is the answer :-
Largest phylum is Arthropoda ✔✔✔
Characteristic features of Phylum Arthropoda
→The body structure shows bilateral symmetry.
→They are triploblastic.
→They can be found in all types of habitats – land, water and soil.
→They have jointed limbs.
→The body is segmented into three regions – Head, Thorax and Abdomen.
→The body cavity is filled with blood and is called the haemocoel. The blood is white in colour.
→The exoskeleton is hardened and is made of chitin.
→They have a well-developed central nervous system.
→The head is well developed and bears the sensory organs and brain.
→They have compound eyes and mosaic vision.
→The digestive tract is complete with the mouth and anus at opposite ends of the body.
They have an open circulatory system with dorsal heart and arteries.
→Respiration is through the general body surface or by gills in aquatic forms and through trachea or book lungs in terrestrial forms.
→Sexes are separate and sexual dimorphism is exhibited ✔✔✔
Hope it helps ,
☺
Answer-
Arthropoda is the largest phylum
Features-
- Triploblastic, bilaterally, symmetical and metamerically segmented animals.
- Body segments are grouped into two regions - Cephalothorax (head and thorax together) and abdomen, or three regions - head, thorax and abdomen. Anterior part of body forms a distinct head , bearing sense organs and brain.
- Exoskeleton of cuticle, containing protein, lipid, chitin, and often calcium carbonate is secreted by underlying epidermis and shed (moulted) at intervals.
- They have complex muscular system, with endoskeleton for attachment, striated muscles for rapid actions and smooth muscles for visceral organs. cilia are absent.
- Each body segment (somite) usually bears paired lateral and jointed legs or appendages.
- Body cavity is haemocoel. The coeloms are reduced to the spaces of the genital and excretory organs.
- Alimentary canal is complete, mouth and anus lie at opposite ends of the body.
- Respiration through general body surface, by gills, air tubes or book - lungs.
- Circulatory system is open with dorsal heart, arteries and haemocoel (blood sinues) but without capillaries and veins. It means that blood does not flow in well defined blood vessels.
- True nephridia absent.