Real red blood cells owe their astonishing agility to their "biconcave" or tyre-like shape, and to get the same kind of synthetic particles, Samir Mitragotri and his team got their inspiration from the way real red blood cells acquire their final shape in the body. ❋ Unknown (2009)
Real red blood cells owe their astonishing agility to their "biconcave" or tyre-like shape. ❋ Unknown (2009)
Again, the more ancient Crocodilia and Lacertilia have vertebrae with the articular facets of their centra flattened or biconcave, while the modern members of the same group have them procoelous. ❋ Unknown (2007)
‘Polypterus’, and presenting numerous important resemblances to the existing genus, which possesses biconcave vertebrae, are, for the most part, wholly devoid of ossified vertebral centra. ❋ Unknown (2007)
(Gr. [Greek: koilae], a hollow) or _angulus lunularis_, biconcave. ❋ Various (N/A)
The human blood-corpuscle is a non-nucleated, biconcave disc, having a diameter of about 1/3500 of an inch. ❋ Unknown (N/A)
Colored or red corpuscles (erythrocytes), when examined under the microscope, are seen to be circular disks, biconcave in profile. ❋ Unknown (1918)
The disk has no nucleus, but, in consequence of its biconcave shape, presents, according to the alterations of focus under an ordinary high power, a central part, sometimes bright, sometimes dark, which has the appearance of a nucleus (Fig. 453, a). ❋ Unknown (1918)
In reality, as everybody knows nowadays, these are biconcave disks, but owing to their peculiar figure it is easily possible to misinterpret the appearances they present when seen through a poor lens, and though Dr. Thomas Young and various other observers had come very near the truth regarding them, unanimity of opinion was possible only after the verdict of the perfected microscope was given. ❋ Unknown (1904)
They retained the evidence of their close relationship with the Devonian fishes in their cold blood, their gills and aquatic habit during their larval stage, their teeth with dentine infolded like those of the Devonian ganoids but still more intricately, and their biconcave vertebrae which never completely ossified. ❋ William Harmon Norton (1900)
Constituting a transition type between the amphibians on the one hand, and both the higher reptiles and the mammals on the other, they retained the archaic biconcave vertebra of the fish and in some cases the persistent notochord, while some of them, the theromorphs, possessed characters allying them with mammals. ❋ William Harmon Norton (1900)
The primitive biconcave vertebrae of the fish and of the early land vertebrates were retained, and the limbs degenerated into short paddles. ❋ William Harmon Norton (1900)
The mammals are distinguished from the other Vertebrates by the circular form of their biconcave red cells and by the absence of a nucleus (Figure 1.1); only a few genera still have the elliptic form inherited from the reptiles (Figure 1.2). ❋ Ernst Heinrich Philipp August Haeckel (1876)
The biconcave shape is an approximation towards the condition which is almost universal in bony fishes, though not quite universal, since the bony pike (Lepidosteus) has a ball at one end of each vertebra and a cup at the other. ❋ Unknown (1874)
In many tailed Batrachians the vertebræ are biconcave, as e.g. in Spelerpes, Amphiuma, Proteus, and Siren. ❋ Unknown (1874)
Moreover, even in some reptiles (e.g. the lizards called Geekoes) the vertebræ are biconcave, and the same was the case with the majority of those species of crocodiles the remains of which are found in strata older than the chalk, and even in existing crocodiles the first vertebra of the tail is biconcave. ❋ Unknown (1874)
Thus the Devonian Ganoids, though almost all members of the same sub-order as _Polypterus, _ and presenting numerous important resemblances to the existing genus, which possesses biconcave vertebræ, are, for the most part, wholly devoid of ossified vertebral centra. ❋ Thomas Henry Huxley (1860)
Again, the more ancient Crocodilia and Lacertilia have vertebræ with the articular facets of their centra flattened or biconcave, while the modern members of the same group have them procoelous. ❋ Thomas Henry Huxley (1860)
Thus the Devonian Ganoids, though almost all members of the same sub-order as 'Polypterus', and presenting numerous important resemblances to the existing genus, which possesses biconcave vertebrae, are, for the most part, wholly devoid of ossified vertebral centra. ❋ Thomas Henry Huxley (1860)
