A Course of Elementary Instruction in Practical Biology
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p. 182), maybe concerned in respiration, through the mediation of its thin inner wall.
The excretion of nitrogenous waste goes on in the two large green glands which lie in the cephalon. Each gland stands related to a thin-walled muscular sac which opens upon the ventral face of the basal joint of the antenna.
The gland itself consists of a series of coiled tubes, abundantly supplied with blood vessels.
1 84 ELEMENTARY BIOLOGY. [CHAP.
The nervous system consists of a chain of thirteen gan- glia... — united by longitudinal commissures — lodged in the median line of the ventral aspect of the body, from which nerves are given to the organs of sense, to the muscles of the trunk and limbs, and to the integument ; and of a visceral nervous system, developed chiefly upon the stomach and hinder segment of the intestine.
The ganglia are centres of aggregation of the nerve cells; of the thirteen seen in the adult the most an- terior lies in the cephalon, close to the attachments of the three anterior pair of appendages, and gives branches to them and to the visceral nervous system.
What to read after A Course of Elementary Instruction in Practical Biology?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
p. 182), maybe concerned in respiration, through the mediation of its thin inner wall.
The excretion of nitrogenous waste goes on in the two large green glands which lie in the cephalon. Each gland stands related to a thin-walled muscular sac which opens upon the ventral face of the basal joint of the antenna.
The gland itself consists of a series of coiled tubes, abundantly supplied with blood vessels.
1 84 ELEMENTARY BIOLOGY. [CHAP.
The nervous system consists of a chain of thirteen gan- glia... — united by longitudinal commissures — lodged in the median line of the ventral aspect of the body, from which nerves are given to the organs of sense, to the muscles of the trunk and limbs, and to the integument ; and of a visceral nervous system, developed chiefly upon the stomach and hinder segment of the intestine.
The ganglia are centres of aggregation of the nerve cells; of the thirteen seen in the adult the most an- terior lies in the cephalon, close to the attachments of the three anterior pair of appendages, and gives branches to them and to the visceral nervous system.
What to read after A Course of Elementary Instruction in Practical Biology?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
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