Peritremes are the integument at the edge of the undershell that surround the spiracles to be discussed later. As you can see, the genital plate is “arrowhead-shaped”, and appears only in females. The male would have a gonopore at the top of the sternal shield, and “spermadactyl fu...
(A) Developing eye from a mid-term (gestational day 128) equine embryo showing the developing neuroretina (thick C-shaped layer lining the deep portion of the globe and encircling the lens vesicle), lens vesicle (∗) and the optic stalk (or primitive optic nerve [arrowhead]). (B) Near...
3 Age series of the ossification of the mouse pisiform. (a) Alcian blue/alizarin red-stained mouse forelimb showing the initial ossification of the pisiform at P4 (green arrowhead). (b) At P7 the primary center is largely ossified while an incipient secondary center can be seen as a ...
such as tissues, organs, and organisms as a whole. Such structures, here called anatomical entities. An the anatomical entity, it constitutes the “structural organization” of an individual member of a biological species. At cellular level, “...
In 1635, Cabeza de Vaca first described operative removal of an arrowhead from the chest wall of a Native American. In 1814, Larrey (Napoleon's military surgeon) reported various injuries to the subclavian vessels. Rehn performed the first successful human cardiorrhaphy in Germany in 1896. Hill...
A specific implementation of this concept is the extraction of an entire L1 larva ofC. elegans, followed by repeated steps of attachment to the receiving grid, sectioning and transfer of the remaining volume to the next attachment site (Fig.1). While material is still lost during sectioning and...
soft-tissueattenuationandbilobedorarrowhead-shouldbeexercised.Scanswiththincollimation shaped,witheachofthetwolobes(rightandleft)arehelpfulindistinguishingnodesfromvolume contactingthemediastinalpleura.Eachlobeusu-averaging. allymeasures1to2cminthickness(measured perpendiculartothepleura),butthisvaries(Fig.MainPulmona...
The quadratus femoris externally rotates and adducts the thigh. The inferior gemellus is an external rotator of the thigh (seeImage.Posterior Hip Muscles) Physiologic Variants Lumbosacral trunk variants differ in terms of root thickness, arrangement, exit direction with respect to the piriformis muscle...
The anterior horizontal ramus (small white arrowhead) and the anterior ascending ramus (small white arrow) of the sylvian fissure (S) extend into F3, dividing it into the pars orbitalis (or), pars triangularis (tr), and pars opercularis (op). They give F3 the shape of an upper case M...
(D) 5HT cells innervate the antennal lobe (AL; right arrow) and the suboesophageal ganglion (SOG; left arrowhead). (E) The mushroom body lobes (MB; arrow) and the (E) MB calyx (arrow) show only very week – if any - innervation. (F) By contrast, the larval ...