GATE (TF) Textile 2014 Question Paper Solution | GATE/2014/TF/05

The medulla is a part of the wool fiber structure. It is the innermost layer of the wool fiber and is composed of a series of irregularly shaped cells that are often filled with air. The medulla is responsible for providing insulation and warmth to the wool fiber, as the air trapped within the medulla acts as an insulating layer. The medulla also gives wool its characteristic crimp or waviness, which contributes to its elasticity and resilience. The presence and size of the medulla can vary depending on the type of animal the wool comes from and other factors such as genetics and environmental conditions.

Yes, the medulla is typically absent in wool fibers. Wool fibers, which come from the fleece of animals such as sheep, do not usually have a medulla. The medulla is more commonly found in the hair shafts of mammals, including human hair, and is not a prominent feature in wool fibers.
Wool fibers are composed of three main layers: the cuticle, the cortex, and the medulla. However, the medulla is generally not present in wool fibers. The cuticle is the outermost layer and consists of overlapping scales that help protect the fiber. The cortex makes up the bulk of the fiber and provides its strength and resilience. The medulla, which is a central core of cells, is not typically a part of wool fibers.
It’s important to note that the structure of wool fibers can vary depending on factors such as the breed of the sheep, the animal’s age, and the environmental conditions in which the animal is raised. However, in general, the medulla is not a characteristic component of wool fibers.