its not a refraction its rarefaction
Longitudinal
A wave must be transverse or longitudinal or both.
Longitudinal.
Longitudinal Split Tear on Shoulder
its have cross section of a dicotyledonous root
In longitudinal section, the walls of the atria are thinner, and lined with pestinate muscles. The walls of the ventricles, meanwhile, are thick and muscular.
Longitudinal section.
Solar plexus
look on yahoo answers
its not a refraction its rarefaction
It means whole mount..(l.s.) stands for longitudinal section and (c.s.) stands for cross-section
If you cut the heart so that there is a superior and inferior part the section is a transverse section.
The sagittal plane is a vertical plane through the longitudinal axis dividing the body into left and right portions. If the animal is bisected straight down the midline, the section is called a "midsagittal" section. If the animal is sectioned away from and lateral to the midline, the section is referred to as "parasagittal".
zone of cell division-zone of elongation-zone of maturation
If we consider the longitudinal cross section of the single stage of CFC disc, then the plane containing the impeller blade section with hub & shroud is known as the Meridional Plane.
apex