Once the embryo germinates from its seed or parent plant, it begins to produce additional organs (leaves, stems, and roots) through the process of organogenesis. New roots grow from root meristems located at the tip of the root, and new stems and leaves grow from shoot meristems located at the tip of the shoot.
the circulatory system is your heart and blood vessels, and it’s essential to keeping your body functioning. this finely tuned system carries oxygen, nutrients, electrolytes, and hormones throughout your body. interruptions, blockage, or diseases that affect how your heart or blood vessels pump blood can cause complications such as heart disease or stroke.
these complications can arise due to a variety of factors, from genetics to lifestyle. read on to learn more about the types circulatory system diseases and disorders and what their symptoms are.
a solution is a homogeneous mixture of two or more components. the dissolving agent is the solvent. the substance which is dissolved is the solute. the components of a solution are atoms, ions, or molecules, which makes them 10-9 m or smaller in diameter.
example: sugar and water
the particles in suspensions are larger than those found in solutions. components of a suspension can be evenly distributed by a mechanical means, like by shaking the contents, but the components will settle out.
example: oil and water
more examples of suspensions
particles intermediate in size between those found in solutions and suspensions can be mixed such that they remain evenly distributed without settling out. these particles range in size from 10-8 to 10-6 m in size and are termed colloidal particles or colloids. the mixture they form is called a colloidal dispersion. a colloidal dispersion consists of colloids in a dispersing medium.
mire examples of colloids
liquids, solids, and gasses all may be mixed to form colloidal dispersions.
aerosols: solid or liquid particles in a gas.
examples: smoke is solid in a gas. fog is a liquid in a gas.
sols: solid particles in a liquid.
example: milk of magnesia is a sol with solid magnesium hydroxide in water.
emulsions: liquid particles in a liquid.
example: mayonnaise is oil in water.
gels: liquids in solid.
examples: gelatin is protein in water.
quicksand is sand in water.
telling them apart
you can tell suspensions from colloids and solutions because the components of suspensions will eventually separate. colloids can be distinguished from solutions using the tyndall effect. a beam of light passing through a true solution, such as air, is not visible.
light passing through a colloidal dispersion, such as smoky or foggy air, will be reflected by the larger particles and the light beam will be visible.