Crypt (anatomy)
Encyclopedia
Crypts are anatomical structures that are narrow but deep invagination
Invagination
Invagination means to fold inward or to sheath. In biology, this can refer to a number of processes.* Invagination is the morphogenetic processes by which an embryo takes form, and is the initial step of gastrulation, the massive reorganization of the embryo from a simple spherical ball of cells,...

s into a larger structure.

One common type of anatomical crypt is the Crypts of Lieberkühn
Crypts of Lieberkühn
In histology, an intestinal crypt is a gland found in the epithelial lining of the small intestine and colon...

. However, it is not the only type: some types of tonsils also have crypts. Because these crypts allow external access to the deep portions of the tonsils, these tonsils are more vulnerable to infection.

External links

- "Lymphoid Tissues and Organs: tonsil"
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