4 thoughts on “Information about shells”

  1. Van

    The coat of the Beike software has a special gland cells, which can form calcium alcohol that protects the soft part of the body, called shells. The number, shape and structure of shells are extremely different, and some types have a spiral shell (such as snails, snails, abalone); It has 8 plate shells, arranged in a tile -like arranged (such as stone tadpoles); some types of shells are wrapped into the body (such as squid, gun squid); Essence The main component of the shell is 95 % calcium carbonate and a small amount of shellin. It can generally be divided into 3 layers. The outermost layer is dark brown stratum corneum (shells). It is thin and transparent. It has the effect of preventing carbonated erosion. ), Thicker, consisting of bonded stones secreted by the edge of the coat, the outer and middle layers can expand the area of ​​the shell, but do not increase the thickness; the inner layer is the pearl layer (bottom layer). The vermiculite (Wen Shi) is stacked and has a beautiful luster, which can be thickened with the body's growth. The main chemical components of Fang Xieshi and vermiculite are CACO3. The outer layer of the shell has multiple growth lines with shades of shades and concentric circles, but it does not represent age; its formation is due to some reasons (insufficient food, different seasons, reproductive periods, etc.) because of the edges of the coat. The results that cannot be secreted.

  2. Steven

    You can process it and install it on your body in the future. As a decoration, and then with the slow development of society, people need a coin to be used as an equivalent exchange item. It is more precious to carry, so these are all related to money, there are quilts, his old man is wonderful, today's story. I hope that in the future, more and more children can find out that our lives are closely related to life, uh

  4. Andres

    Know the shell:
    The software animals have almost the shell -shell. The shellfish is divided into five outlines, namely the abdominal footnote, the double shell, the digging of the footnote, the multi -board outline, and the first foot foot. Each outline is divided into several different ethnic groups.
    The abdominal footer shell: Most of the abdominal shells have a small rear water pipe ditch at the back of the shell mouth, and there is a water pipe ditch at the front of the mouth of the shell. There may be pleated on the thread, and the outer lip may have convex teeth. Observe the mouth of the shell, shape, ear -shaped, gyro -shaped, screw -shaped, pear -shaped, spindle -shaped, pipa -shaped and stick -shaped.
    The double shell shell: This type of shell is composed of two left and right shells, and the two shells are connected by one ligament; the ligament can be seen from the bottom of the shell when the two shells are closed. The shape is discs, fan -shaped, ship shapes, paddles, and a few are heart -shaped and irregular.
    It other outline shells: Multi -board, digging, and head and foot scriptures are far less abdominal and double -shelling. All the foot -to -foot class is ivory, and the shape of the rare head and foot shells is almost consistent; the multi -board shells are decorated.

    The growth of shells: The immature shells are very similar to the shells growing, but the size is different. The double shells grow along the edge of the two shells, and the growth direction does not change when the shell grows. The abdominal foot class grows along the shell of the snail tube.

    The composition of shell: Calcium carbonate is the most basic substance that constitutes the shell. The other ingredient is shell protein. The abdominal feet mouth cover will contain this protein. This ingredients are stacked layer by layer to make the shells harder and harder, and some will produce pearl luster. The hard shell increases from the outer edge, and gradually thickens as the growth. Shellfish will also secrete scales, tumors, spinal protrusions and ribs on the outer edge of growth. Because of the periodic and continuity of growth, shells show beautiful colored patterns.

    The collection of shells: Wash the meat, residues, and shells of shellfish to ensure that the shell is completely dry, and then store it in a closed light. Finally, the label is labeled, divided into different categories to facilitate collection and retrieval.

    The shellfish habitat: Software animals can adapt to different living environments. From the rocks that are washed from the sea day and night to the dark deep sea, they all have their special software animal groups. The tidal affects the characteristics and distribution of software animals that grows by the sea, and sufficient sunshine can provide rich food. Software animals are most suitable for the variety of tropical sea shells, which are amazing.

    The protection of habitat: Human beings should not destroy the habitat of the creature as much as possible. Almost every rock and coral reefs are a community where animals and plants survive. Once they are destroyed, they will bring them a disaster. As long as a piece of coral is cut from the coral reef, other coral reefs will die one after another. If there are constant sea -sheet collectors to search for a piece of beach, then this natural habitat will gradually be destroyed. Therefore, please respect the living space of these low -capable low -ability and low abilities.

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