Structural Organisation In Animals


 

Structural Organisation In Animals logoSubject: Biology    Exam: AIIMS

Chapter Rating: Should Do

Topic Weightage: 0.03


Practice QuestionsRevise Chapter

Start a discussion on this chapter




Posting your doubt

Post Discussion

My Chapter Prep Status

Chapter Completion: 0%

Your GEM Score: 0

Check your Good Enough Meter (GEM)

Chapter Expert Trophy

Bhavya Bhadauri...


How can you win?
You need to score more than 1933 marks to beat Bhavya Bhadauria


Others In The Race!
SOUMYA , deepanshu.singh35, Shweta Mishra

Important Points

Nephridiopores of integumentary nephridia 200-250 per segment found in all segments of earthworm except the first six. Clitellar segment contains 2000 nephridipores per segment, so called 'forest of nephridia'.
All segments of earthworm except the first, last and clitellar segment contain setae (perichaetine arrangement). Setae are 'S' - shaped, yellowish and chitinus, 80-120 segment. Setae and contraction of muscles help in locomotion.
In male cockroach, eighth and ninth terga are overlapped by seventh tergum. In female seventh, eighth and ninth stema are fused to form a brood pouch. Seventh stermum of brood pouch forms a pair of gynavalvular plates.
Sense organs in cockroach are - Photoreceptors (compound and simple eyes), thigmoreceptors (antennae), chemoreceptors (on maxillary and labial palps, labium and hypopharynx) and auditory receptors on anal cerci.
Frog can peform respiration through three methods - cutaneous, buccopharyngeal and pulmonary.Cutaneous respiration occurs in water, during hibernation and even aestivation. Buccopharyngeal respiration is performed when oxygen requirement is less, during rest over land and while 'floating' in water.Pulmonary respiration occurs when oxygen demand is high. The rate is not more than 20/min. as compared to 80/min for buccopharyngeal respiration.
 
SimplyLearnt
Sign Up to Study Structural Organisation In Animals