Cleavage meaning

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ADVERTISEMENTS: After reading this article you will learn about:- 1. Meaning of Rock Cleavage 2. Types of Rock Cleavage 3. Importance. Meaning of Rock Cleavage: Certain rocks can get split into thin sheets along closely spaced parallel planes which may be inclined to the bedding planes. Such tendency of a rock is called rock cleavage. Rock cleavage is seen in foliated rocks formed by the action of direu pressure and generally accompanied by some recrystallization and elongation with the constituent minerals in parallel arrangement. Metamorphic rocks like schists and slate have this characteristic property of rock cleavage. However, this property is also exhibited by shales and limestone’s under shear stresses and low temperature. ADVERTISEMENTS: The degree of cleavage depends on the degree of the parallel arrangement of the constituents and the inequality of size of the constituent grains. Cleavages are observed normal to the direction of greater pressure or in the plane of action of shear stresses which may be at some inclination to the direction of greatest pressure. Types of Rock Cleavage: Two types of rock cleavages can exist in the rocks, namely flow cleavage and fracture cleavage. 1. Flow Cleavage: This cleavage shows not only partings between the oriented mineral grains but also partings of cleavage planes of the minerals. This type of cleavage is characteristic of slate and some varieties of schists exhibiting the property in the whole mass. ADVERTISEMENTS: This ty...

What Does Cleavage Embryo Mean? A cleavage embryo refers to an embryo at the stage of its development in which it is undergoing a series of cell divisions or cleavages. This stage begins about 24 hours after the egg is fertilized and lasts until the morula is formed around 4 days after fertilization. FertilitySmarts Explains Cleavage Embryo About 24 hours after an egg has been fertilized, its first division (cleavage) occurs. The result of this division is a 2-cell organism. These cells further divide or cleave, to progress through 4-cell, 8-cell, and 16-cell stages. Each of the cells in these stages is known as a blastomere and some will later go on to form a blastocyst. Although the cells within the embryo are increasing, the embryo itself remains about the same size throughout this process. As the cells are dividing, small portions of the cell may break off and form a bleb. This is called fragmentation and can impact the quality of the embryo. In Vitro Fertilization (IVF) During in vitro fertilization (IVF), cleavage stage embryos are examined on the third day after fertilization and graded on their quality. The cleaving process is primarily driven by the maternal genome and often occurs on autopilot. Many eggs fertilize and cleave but some embryos arrest when the maternal and paternal genome fails to work together after day three. That is why some cleaving embryos fail to develop to the blastocyst stage. An embryologist can never visually identify if failure to develop...

Just one missed blouse button and your “girls” can suddenly go from classy to trashy. Whether you meant to show off the goods on purpose or you’re just too busty to help it, learn how and when to give your cleavage its stage time with our 6 rules for best breast etiquette. Plus, are you wearing the right bra size? Find out with our quiz... The average breast size has grown from a 34B to a 36C since the 1970s and clothing styles are smaller and snugger. So it’s no wonder the line between “Nice!” and “Look at those!” has blurred. “I don’t think women are stupid,” says Elisabeth Squires, author of bOObs: A Guide to Your Girls. (Seal Press). “I just don’t think anyone knows the rules.” If you're confused about when to flaunt them and when to cover up, here’s what the experts say: Rule #1: Acknowledge the obvious. Sex sells. And like it or not, breasts get beer sold and burgers bought. It’s not such a stretch to realize your ta-tas are more likely to get checked out than, say, your knees or collarbones. So do a double take in the mirror before walking out the front door in the morning. “[Women] understand the power of breasts in general, but they don’t understand the power of their own,” Squires says. You may aim for different effects depending on the situation, but understanding how and when to tap into the power of your cleavage will help you achieve the desired result anytime, anywhere. One can look like a hoochie mama, Mother Superior or somewhere in between as a sexy and c...

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