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But the delicate nose advances always into the air, our palpable communicator with the infinite air. Thus it has its first delicate root in the cardiac plexus, the root of its intake. And the root of the delicate-proud exhalation, rejection, is in the thoracic ganglion. But the nostrils have their other function of smell.
The male-bird brought all his kill to his mate he ate little himself: only what she left him, usually the entrails, the flesh of the thoracic muscles, the skin and the head, although she usually pecked out the eyes as the most savoury portion. The sun was bright. There was a soft, gentle breeze.
These nerves assist in controlling respiration and are called the phrenic nerves. Find other nerves going to different parts of the thorax. Remove the heart and lungs. Find in the back part of the thoracic cavity, on each side of the spinal column, a number of small "knots" of nervous matter joined together by a single nerve. These are sympathetic ganglia.
Theories sufficient have been hazarded, and books written without number from the days of old Aristotle, who arranged them in three great divisions, the Cetaceous, the Cartilaginous, and the Spinous; down to Gmelin, who divided them into six orders, the Apodal, the Jugular, the Thoracic, the Abdominal, the Branchiostagous, and the Chondropterygious.
Ford examined weighed 170 lbs., without the thoracic, or pelvic, viscera, and measured four feet four inches round the chest.
The diaphragm is formed later on as a muscular horizontal partition between the thoracic and abdominal cavities. It then completely separates the two cavities, and is only pierced by several organs that pass from the one to the other. One of the chief of these organs is the oesophagus.
The lymphatics unite to form larger and larger vessels, and at last join the thoracic duct, except the lymphatics of the right side of the head and chest and right arm. These open by the right lymphatic duct into the venous system on the right side of the neck. It is convenient, however, to treat it under the general topic of absorption, in order to complete the history of food digestion.
I have sometimes even seen the three thoracic segments stung twice over: at the beginning of the attack and again when the Wasp returned to her vanquished prey. The Ammophila's triumphant transports beside her wounded and writhing victim are also subject to exceptions.
After bathing and nourishing the tissues, it is collected by lymph vessels, which return it to the blood stream by way of the thoracic duct. These lymph vessels take origin in the lymph spaces of the tissues and in the walls of serous cavities, and they usually run alongside blood vessels perivascular lymph vessels.
At the time of my observations, a comparatively tiny proportion of the starving legion was waiting on the flowers; the others were still wandering on the ground, where the Anthophoræ very rarely alight; and yet I detected the presence of several Meloe-larvæ in the thoracic down of nearly all the Anthophoræ which I caught and examined.
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