A striated duct is a gland

Gland

A gland is an organ in an animal's body that synthesizes a substance for release of substances such as hormones or breast milk, often into the bloodstream or into cavities inside the body or its outer surface .- Types :...

 duct

Duct (anatomy)

In anatomy and physiology, a duct is a circumscribed channel leading from an exocrine gland or organ.-Types of ducts:Examples include:-Duct system:...

 which connects an intercalated duct

Intercalated duct

The intercalated duct, also called intercalary duct, is the portion of an exocrine gland leading directly from the acinus to a striated duct. The intercalated duct forms part of the intralobular duct...

 to an interlobular duct

Interlobular duct

An Interlobular duct is a gland duct which connects more than one lobule. It is smaller than an interlobar duct.Examples of where it can be found include* pancreas* mammary gland* parotid gland...

. It is characterized by the basal infoldings of its plasma membrane, characteristic of ion-pumping activity by the numerous mitochondria. Along with the intercalated ducts, they function to modify salivary fluid by secreting HCO₃^- and K⁺ and reabsorbing Na⁺ and Cl^- using the Na-K pump and the Cl-HCO₃ pump.

Their epithelium

Epithelium

Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. Epithelial tissues line the cavities and surfaces of structures throughout the body, and also form many glands. Functions of epithelial cells include secretion, selective...

 can be simple cuboidal or simple columnar.

Striated ducts are part of the intralobular duct

Intralobular duct

An intralobular duct is the portion of an exocrine gland inside a lobule, leading directly from acinus to interlobular duct. It is composed of two subdivisions, the intercalated duct and the striated duct....

s.

They are found in the submandibular gland

Submandibular gland

The paired submandibular glands are salivary glands located beneath the floor of the mouth. In humans, they account for 70% of the salivary volume and weigh about 15 grams. Unstimulated in humans, the percentage contribution to whole saliva; ~25% Parotid, Submandibular and Sublingual ~ 67% and...

 and the parotid gland

Parotid gland

The paired parotid glands are the largest of the salivary glands. They are each found wrapped around the mandibular ramus, and secrete saliva through Stensen's ducts into the oral cavity, to facilitate mastication and swallowing and to begin the digestion of starches.-Location:The parotid glands...

.

They are not present in pancreas

Pancreas

The pancreas is a gland organ in the digestive and endocrine system of vertebrates. It is both an endocrine gland producing several important hormones, including insulin, glucagon, and somatostatin, as well as a digestive organ, secreting pancreatic juice containing digestive enzymes that assist...

.