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A cilium (plural cilia) is an organelle found in eukaryotic cells. Cilia are thin, tail-like projections extending approximately 5–10 micrometers outwards from the cell body.
There are two types of cilia: motile cilia, which constantly beat in one direction, and non-motile cilia, which typically serve as sensory organelles.
To grow a cilium, the building blocks of the cilia such as tubulins and other partially assembled axonemal proteins are added to the ciliary tips which point away from the cell body. A bi-directional motility called intraciliary/intraflagellar transport or IFT plays an essential role to move these building materials from the cell body to the assembly site.

Goblet cells are found scattered among other cells in the epithelium of many organs, especially in the intestinal and respiratory tracts.Goblet cells are glandular simple columnar epithelial cells whose sole function is to secrete mucus.

The major part of the pancreas is the glandular exocrine portion. Islets of endocrine tissue are found throughout the glandular exocrine portion (Islets of Langerhans).
The glandular exocrine portion of the pancreas consists of clusters of secretory cells. These secretory cells secrete enzymes, while their ducts secrete bicarbonate.

2007-01-23 11:12:26 · answer #1 · answered by MSK 4 · 0 0

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