If glands are categorized by shape, tubular glands contrast with alveolar glands. Tubular glands retain their shape as a tube throughout their length whereas alveolar glands have a saclike secretory portion.
Tubular glands are further classified as one of the following types:
or simple straight tubular
or straight tubular
|the gland is a uniform tube||Small intestine (Crypts of Lieberkühn), uterine glands|
or simple coiled tubular
|the gland is coiled without losing its tubular form||sweat glands|
|simple branched tubular
or compound tubular
|branching occurs in the tubes||pyloric glands of stomach|
Vertical section of mucous membrane of human uterus.
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