. Ants; their structure, development and behavior. here described are produced, so to speak, entirelyat the expense of the elasticity of the cardiac wall, which dilates consid-erably. With this dilatation the valvules move away from the points towhich they were applied and the blood streams through the osteoles andfills the heart. The blood, propelled by the contracting heart, pours THE L-R\.lL STRUCTURE OF ANTS. 47 into the head, bathes all the organs and then leaves it through the neckto traverse the whole thoracic cavity in an antero-posterior having passed through the much
. Ants; their structure, development and behavior. here described are produced, so to speak, entirelyat the expense of the elasticity of the cardiac wall, which dilates consid-erably. With this dilatation the valvules move away from the points towhich they were applied and the blood streams through the osteoles andfills the heart. The blood, propelled by the contracting heart, pours THE L-R\.lL STRUCTURE OF ANTS. 47 into the head, bathes all the organs and then leaves it through the neckto traverse the whole thoracic cavity in an antero-posterior having passed through the much constricted peduncle of thepetiole and postpetiole, it enters the gaster and flows through twopassages, separated by a diaphragm that divides the body cavity into aventral, or neural, and a dorsal, or visceral, sinus. One current descendsthrough the dorsal, another through the ventral sinus, following thelatter to the tip of the gaster. The dorsal sinus, which is very largeand supplies the heart with the blood it propels into the head, is thus.
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectants, bookyear1910
