. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. 448 THE SENSORIAL FUNCTIONS. the sclerotica: its fibres descending in a parallel course towards the optic nerve, where they termi- nate, by a semi-circular edge, in a tubular This tendon has no particular attachment, but is employed for the purpose of serving as a loop for the passage of the long tendon of the second muscle (p), which is called the pyramidalis, and which arises from the lower and back part of the sclerotica. Its tendon (t), after pa
. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. 448 THE SENSORIAL FUNCTIONS. the sclerotica: its fibres descending in a parallel course towards the optic nerve, where they termi- nate, by a semi-circular edge, in a tubular This tendon has no particular attachment, but is employed for the purpose of serving as a loop for the passage of the long tendon of the second muscle (p), which is called the pyramidalis, and which arises from the lower and back part of the sclerotica. Its tendon (t), after passing through the channel above described, which has the effect of a pulley, is conducted through a circular sheath, furnished by the sclerotica to the under part of the eye, and is inserted into the lower portion of the loose edge of the nictitating membrane. By the united action of these two muscles, the former of which serves merely to guide the tendon of the latter, and increase the velocity of its action, the membrane is rapidly drawn over the front of the globe. Its return to its former position is effected simply by its own elasticity, which is sufficient to bring it back to the inner corner of the eye. If the membrane itself had been furnished with mus- cular fibres for effecting this motion, they would have \. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Roget, Peter Mark, 1779-1869. London : W. Pickering
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