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The intercostal spaces are crossed by fine engraved striae. Aperture :—The mouth is linear, fortified by a thick broad varix , both sides beset with stout external denticules—ten on the left, nine on the right side.
In reference to the muscles of the thoracic wall, the intercostal nerves and vessels run posterior to the internal intercostal muscles: therefore, they are generally covered on the inside by the parietal pleura, except when they are covered by the innermost intercostal muscles, innermost intercostal membrane, subcostal muscles or the transversus thoracis muscle.
They are marked by low, rather broad, rounded, almost vertical axial ribs, of which 18 occur upon the second to fourth, 20 upon the fifth, 22 upon the sixth, 24 upon the seventh, and 28 upon the penultimate turn. The intercostal spaces a little narrower than the ribs. They are marked by six spiral series of well incised, equally spaced pits.
Image credits: _feffers_ Full honesty, Pandas. Yours truly has had a long string of both successes and failures when it comes to gardening. While my cacti, money plants, pines, and singular ...
Both riblets and intercostal spaces are closely encircled by alternately larger and smaller threads, which are in turn grained by finer radial lines. The aperture is narrow. It has a well developed external varix, slightly incised by a posterior notch. Within the outer lip are a few small denticules, and on the inner lip fourteen short entering ...
It's important to pick plants with similar sunlight requirements so they all thrive in the same space—and to ensure one half of your plant wall isn't crispy while the other blooms.
Aerenchyma in stem cross section of a typical wetland plant. Aerenchyma or aeriferous parenchyma [1] or lacunae, is a modification of the parenchyma to form a spongy tissue that creates spaces or air channels in the leaves, stems and roots of some plants, which allows exchange of gases between the shoot and the root. [2]
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