3/23/2021 0 Comments Leaf Animal Structure Function
Such cells take on specific roles and lose their ability to divide further.They all transport water, minerals, and sugars produced through photosynthesis through the plant body in a similar manner.All plant species also respond to environmental factors, such as light, gravity, competition, temperature, and predation.
Might this allow the cells to form structures that can grow upright. These organs, in turn, are made of different kinds of tissues, which are groups of cells which work together to perform a specific job. For example, your stomach is made of muscle tissue to facilitate movement and glandular tissue to secrete enzymes for chemical breakdown of food molecules. These tissues, in turn, are made of cells specialized in shape, size, and component organelles, such as mitochondria for energy and microtubules for movement. Plant tissues, like ours, are constructed of specialized cells, which in turn contain specific organelles. It is these cells, tissues, and organs that carry out the dramatic lives of plants. For example, they are enclosed by a plasma membrane and have a nucleus and other membrane-bound organelles. A typical plant cell is represented by the diagram in Figure 2. Its primary role is to maintain pressure against the inside of the cell wall, giving the cell shape and helping to support the plant. It consists mainly of cellulose and may also contain lignin, which makes it more rigid. It prevents the cell from absorbing too much water and bursting. Chloroplasts contain the green pigment chlorophyll and carry out photosynthesis. These cells make up ground tissue, which will be discussed in another concept. The different types of plant cells have different structures and functions. Plant tissue systems fall into one of two general types: meristematic tissue and permanent (or non-meristematic) tissue. Cells of the meristematic tissue are found in meristems, which are plant regions of continuous cell division and growth. Meristematic tissue cells are either undifferentiated or incompletely differentiated, and they continue to divide and contribute to the growth of the plant. In contrast, permanent tissue consists of plant cells that are no longer actively dividing. ![]() Lateral meristems facilitate growth in thickness or girth in a maturing plant. ![]() This tissue enables the monocot leaf blade to increase in length from the leaf base; for example, it allows lawn grass leaves to elongate even after repeated mowing.
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