Arrange the ganglia of Autonomous nervous system of cockroach in correct sequence from anterior to posterior end
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The Autonomous nervous system or the sympathetic nervous system of the cockroach comprises the following ganglia and nerves:
1) Frontal Ganglion: It lies on the dorsal wall of the pharynx in front of the brain. It is connected with the hind brain by the Frontal connectives. A Frontal nerve arises from the Frontal Ganglion anteriorly to the Frontal region. The recurrent (visceral) nerve runs from the Frontal Ganglion posteriorly above the oesophagus.
2) Occipital Ganglion: After running a short distance, the recurrent nerve becomes thickened to form the occipital ganglion. Three nerves arises from the occipital Ganglion the two lateral ones are called occipital nerves: each runs to the corpus cardiacum (Endocrine gland) of its side. The median one, the recurrent nerve passes posteriorly on the oesophagus and forms ingluvial ganglion near the crop of the cockroach.
3) Ingluvial Ganglion: As mentioned earlier above, the median nerve of the occipital Ganglion becomes thick posteriorly and gives rise to the ingluvial ganglion near the crop of the cockroach. A pair of lateral ingluvial sub-nerves and ingluvial nerves arise from the ingluvial ganglion posteriorly over the crop of the cockroach. In all it is a complex interconnection of systems.
1) Frontal Ganglion: It lies on the dorsal wall of the pharynx in front of the brain. It is connected with the hind brain by the Frontal connectives. A Frontal nerve arises from the Frontal Ganglion anteriorly to the Frontal region. The recurrent (visceral) nerve runs from the Frontal Ganglion posteriorly above the oesophagus.
2) Occipital Ganglion: After running a short distance, the recurrent nerve becomes thickened to form the occipital ganglion. Three nerves arises from the occipital Ganglion the two lateral ones are called occipital nerves: each runs to the corpus cardiacum (Endocrine gland) of its side. The median one, the recurrent nerve passes posteriorly on the oesophagus and forms ingluvial ganglion near the crop of the cockroach.
3) Ingluvial Ganglion: As mentioned earlier above, the median nerve of the occipital Ganglion becomes thick posteriorly and gives rise to the ingluvial ganglion near the crop of the cockroach. A pair of lateral ingluvial sub-nerves and ingluvial nerves arise from the ingluvial ganglion posteriorly over the crop of the cockroach. In all it is a complex interconnection of systems.
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Answer:
Ganglia are ovoid structures containing cell bodies of neurons and glial cells supported by connective tissue. Ganglia function like relay stations - one nerve enters and an other exits. The structure of ganglia is illustrated by the example of the spinal ganglion.
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