Question

Sweat gland of human being are originated from
A. Ectoderm
B. Mesoderm
C. Endoderm
D. All of the above

Answer 1

Exocrine glands are such types of glands present in the body which are used for external secretion. These glands secrete the waste substances on the body surface through a duct. Salivary glands, mammary glands, sweat glands, etc. are examples of some exocrine glands.

Complete answer:
Exocrine glands are the types of glands that are responsible for the secretion of substances onto an epithelial surface by way of a duct. Sweat glands are an example of the exocrine glands.
Sweat glands are also referred to as sudoriferous or sudoriparous glands. They are small tubular structures present in the skin which are responsible for the produced sweat. These glands produce and secrete substances onto an epithelial surface through a duct.
Two main types of sweat glands are present which are different in their structure, function, secretory product. Their mechanism of excretion and anatomic distribution is also different. These two types of glands are eccrine sweat glands and apocrine sweat glands. The eccrine sweat glands are found almost all over the human body. It is present in the highest density in palms and soles. In the trunk and the extremities, it is also found in a few numbers. Its water-based secretion mechanism is responsible for cooling in humans. On the other hand, the apocrine sweat glands are mostly present in the armpits and perineal area of humans. They are not significant for cooling in humans.
The sweat glands of the human being originated from the ectoderm which is one of the three primary germ layers present in the very early embryo. This layer arises and is formed from the outer layer of germ cells. The ectoderm is also helping in the formation of the nervous system, tooth enamel, and the epidermis. It is also responsible for the formation of the lining of the mouth, anus, nostrils, sweat glands, hair, and nails.

Hence, the correct answer is option (A).

Note: Sweat glands are a type of exocrine gland which are small tubular structures present in the skin and responsible for the release of sweat. These glands secrete substances onto an epithelial surface by way of a duct. The sweat glands of the human being are mainly originated from the ectoderm which is one of the three primary germ layers.