Tissue Section

Cut sections at a thickness of about 4 5 µm you will probably need to discard the first few sections as they are likely to contain holes caused by trimming.

Tissue section. Whole tissue sections formalin fixed paraffin embedded ffpe whole tissue sections are ideal candidates for localizing dna rna and protein markers. Two tissue sections with 5 µm micro micrometer thickness are mounted on a superfrost plus glass slide. Healthy tissues may be destroyed from a cut significant injury or surgery.

The tissue is usually sectioned on a cryostat or freezing microtome. A tissue cut in the long direction is called a longitudinal section l s and one cut perpendicular to this is a cross section c s. Hard tissue such as bone and cavernous tissues such as liver or heart present special challenges when sectioning.

A section cut at an angle between a longitudinal and cross section is an oblique section. The tissue holder or chuck is then set upon a freezing temperature bar. In addition less than ideal fixation and embedding techniques can make sectioning difficult.

Similar to the frozen section procedure employed in medicine cryosectioning is a method to rapidly freeze cut and mount sections of tissue for histology. Microscopic view of a histologic specimen of human lung tissue stained with hematoxylin and eosin. Scar tissue refers to thick fibrous tissues that take the place of healthy ones that have been damaged.

In biology tissue is a cellular organizational level between cells and a complete organ. Biochain has been a trusted source for tissues as well as proteins dna and rna isolated from the materials in our tissue bank to clinical and biopharmaceutical researchers. The tissue is typically cut into thin sections 5 10 µm or smaller pieces for whole mount studies to facilitate further study.

Cross section of sclerenchyma fibers in plant ground tissue. Figure 5 2 shows how certain organs look when sectioned on each of these planes. The frozen sections are mounted on a glass slide and may be stained to enhance the contrast between different tissues.