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प्रश्न
With a suitable diagram, describe the organisation of mammary gland.
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उत्तर
A functional mammary gland is characteristic of all female mammals. The mammary glands are paired structures (breasts) that contain glandular tissue and variable amount of fat. The glandular tissue of each breast is divided into 15 – 20 mammary lobes containing clusters of cells called alveoli. The cells of alveoli secrete milk, which is stored in the cavities (lumens) of alveoli.
The alveoli open into mammary tubules. The tubules of each lobe join to form a mammary duct. Several mammary ducts join to form a wider mammary ampulla which is connected to lactiferous ducts through which milk is sucked out.
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संबंधित प्रश्न
Name the function of the following:
Endometrium
Fill in the blank:
Development of baby (foetus) takes place inside __________.
Rewrite the terms in the correct order so as to be in a logical sequence.
Graafian follicle, ostium, uterus, fallopian tube.
Explain with examples types of asexual reproduction in unicellular organisms.
Choose the correct answer:
Ovum is a ______________
Name the following:
The parts of the ovary containing mature ovum.
Name the Following
The term used when beard and mustache appear, harshening of voice, broadening of shoulders, etc. takes place.
______ pollen mother cells should undergo meiotic division to produce 64 pollen grains.
Which of the following is a permanent method of contraception in a human female?
The opening of the vagina is often covered partially by a membrane called ______.
The finger-like projections, called fimbriae, help in the collection of ovum into the fallopian tube following ovulation.
Endometrium undergoes cyclical changes and help in uterine movements.
Read the following and answer from given below:
Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.
Identify the functions of LH.
- Release of a secondary oocyte from Graafian follicle.
- Stimulates corpus luteum to secrete progesterone.
- Stimulates estrogen formation.
- Promotes development of egg to form secondary oocyte.
Mother gives birth to a baby but the baby has characters of both parents. How is this possible?
The vaginal orifice is covered by a fold of membrane called hymen ______.
Write the specific location of the following:
Vagina
Which structure is a thin membrane partially covering the vaginal opening and has variable presence?
Which statement correctly describes the basic composition of each breast?
After puberty, how often do the ovaries release one ovum?
