There are three thoracic ganglia and six abdominal ganglia. Nervous System of Periplaneta: The nervous system of cockroach com­prises of: (a) Central nervous system comprising of a brain or supraoesophageal ganglion, sub-oesophageal ganglion, circumoesophageal connectives and the ventral nerve cord. Parasympathetic nervous system provides relaxation, comfort, pleasure at the time of rest. COCKROACH The slide contain about- 1. In the head region, the brain is represented by supra-oesophageal ganglion, which supplies nerves to antenna and compound eyes. Wings extend beyond the tip of the abdomen in males. Brain has grey matter on the outer side and white matter on the inner side. Central Nervous System. Feature of cockroach 3. Difference between male and female cockroach 5. In spinal-cord, grey matter is on the inner side and white matter on the outer side. Male cockroaches have pair of testes, genital pouch, vasa deferentia, seminal vesicles, ejaculatory duct and conglobate gland. Periplaneta americana is the common species of cockroach. Sensory System. Sympathetic nervous system increases defence system of body against stressful conditions. Remaining part is situated along the ventral part of the body. Nervous system . Go through our anatomy of cockroach class 11 ppt to understand reproductive process in cockroach. An adult cockroach is about 34 – 53 mm long. Remaining part is situated along the ventral part of the body. In the head, the supra-oesophageal ganglion represents the brain, which supplies nerves to … Morphology- Head , Thorax , Abdomen 4. CNS consist of two parts : brain and spinal cord. Nervous System of Cockroach (ii) Peripheral Nervous System : Consists of nerves, which are given off from the ganglia so as to innervate all parts of the body. Free PDF download of Class 11 Biology Chapter 7 - Structural Organisation in Animals Revision Notes & Short Key-notes prepared by expert Biology teachers from latest edition of CBSE(NCERT) books. In cockroach, there is an accessory pulsatile vesicle at the base of each antenna which also pumps blood. The nervous system of cockroach is spread throughout the body. COCKROACH MORPHOLOGY. Anatomy of Earthworm,Cockroach & Frog of Class 11. - The head holds only a bit of nervous system. The document Doc: Cockroach- Respiratory and Nervous System NEET Notes | EduRev is a part of the NEET Course Biology Class 11. head, thorax and abdomen. It helps in the restoration and conservation of energy. The nervous system in cockroach consists of a series of ganglia in each segment, which are attached to a ventral nerve cord and a brain. Classification of cockroach 2. Fig. So, if the head of cockroach is cut off, it will still live for one week. (iii) Sympathetic or Stomato-gastric Visceral Nervous System: Consists of a frontal ganglion, which is situated on the dorsal side of the oesophagus in the head. 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