Biology
Answer
Two glands found in the human skin are:
- Sebaceous gland — They produce sebum, an oily secretion which makes the hair and the outer surface of the skin oily and waterproof to keep the epidermis supple and to prevent water loss by evaporation.
- Ceruminous gland — It secretes cerumen which lubricates and protects the delicate eardrum from dust particles and germs.
Related Questions
Given below is a diagrammatic sketch of the vertical section of human skin.
(a) Label the parts numbered 1 to 9
(b) State one main function of each of the following parts:
- Part 2.
- Part 3.
- Part 4.
- Part 9.
(c) Name any one of the above parts which has at least three functions.
(d) Part 4 may add to one's good appearances or the "figure". State one example of this function which may be common to both men and women.
The figures A and B given below represent the ways of heat regulation in our body with the help of blood vessels. Study the figures and answer the following questions.
(a) Name the process/condition shown in figures A and B.
(b) During what climatic conditions, do these processes occur in our body?
(c) What colour change do we see in the facial appearance of a person during these situations?
(d) Do these situations occur due to emotional causes? If yes, name them.
Why are body hairs present in mammals?
This structure in birds is a counterpart of mammalian hair.
- What is this? ……………
- What is the one common primary function served by these structures both in birds and mammals?