United States or Argentina ? Vote for the TOP Country of the Week !
These microscopic plants belong to the great fungus division, and consist of many varieties, which may be roughly divided into groups, according as they are spherical, rod-like, spiral, or otherwise in shape. Each plant consists of a mass of protoplasm surrounded by an ill-defined cell wall. The bacteria vary cably in size.
Many germs can be grown artificially, some in the presence of air, others only when air is removed. The germ of syphilis belongs in the latter class. The germ that causes tuberculosis, a rod-like organism or bacillus, can stand drying without losing its power to produce the disease, and has a very appreciable ability to resist antiseptic agents.
The life-history of all of these is very similar, the principal difference being in the length of time it takes them to sporulate. Let us begin with the parasite after it has been introduced into the blood and trace its development there. At first it is slender and rod-like in shape. It has some power of movement in the blood-plasm.
Above the membrane, and resting partly upon it, are two rows of rod-like bodies, called the rods of Corti. These, by leaning toward each other, form a kind of tunnel beneath. They are exceedingly numerous, numbering more than 6000, and form a continuous series along the margin of the membrane.
They would alight upon their tentacles, fold their wings to a smallness almost rod-like, and hop into the interior. But among them was a multitude of smaller-winged creatures, like great dragon-flies and moths and flying beetles, and across the greensward brilliantly-coloured gigantic ground-beetles crawled lazily to and fro.
The bacterium is generally a jointed rod-like filament of living matter, and its native world seems to be any putrefying organic substance. Bacteria are the smallest of microscopic organisms. They are widely diffused in the natural world, existing independently and also in a parasitical way, in connection with larger forms of organic life. They multiply with the greatest rapidity.
These spicules are of very varied though regular shape, but ordinarily assume a rod-like needle shape or else a stellate form. In silicious sponges the spicules are composed of silica, and are generally deposited around axial rods in concentric layers.
His whole high, broad form, seemed made of solid bronze, and shaped in an unalterable mould, like Cellini's cast Perseus. Threading its way out from among his grey hairs, and continuing right down one side of his tawny scorched face and neck, till it disappeared in his clothing, you saw a slender rod-like mark, lividly whitish.
The twelfth pair, the hypoglossal, are also motor, pass to the muscles of the tongue, and help control the delicate movements in the act of speech. The Spinal Cord. This is a long, rod-like mass of white nerve fibers, surrounding a central mass of gray matter. It is a continuation of the medulla oblongata, and is lodged in the canal of the spinal column.
His whole high, broad form, seemed made of solid bronze, and shaped in an unalterable mould, like Cellini's cast Perseus. Threading its way out from among his grey hairs, and continuing right down one side of his tawny scorched face and neck, till it disappeared in his clothing, you saw a slender rod-like mark, lividly whitish.
Word Of The Day