Biology
The following diagram represents the vertical sectional view of the human female reproductive system.
(a) Label the parts indicated by the guidelines 1 to 8.
(b) How does the uterus prepare for the reception of zygote?
(c) What happens to the uterus, if fertilization fails to take place?
Answer
(a) The parts indicated by the guidelines 1 to 8 are:
- 1 → Fallopian Tube
- 2 → Funnel of Oviduct
- 3 → Ureter
- 4 → Vagina
- 5 → Ovary
- 6 → Uterus
- 7 → Urinary Bladder
- 8 → Urethra
(b) The lining of the uterus becomes thicker and develops more blood vessels under the influence of the increased amount of oestrogens produced by the ovary to prepare the uterus to receive the zygote and assist in the early implantation of the embryo and its subsequent development.
(c) If fertilization fails to take place, the thickened lining of the uterus (endometrium) restarts shedding on the 28th day of the menstrual cycle. Finally it is discharged out along with the unfertilised ovum as the menstrual flow through the cervix and the vagina.
Related Questions
Given below is the outline of the male reproductive system. Name the parts labelled 1 to 8. Also name the corresponding structure of part (4) in the female reproductive system.
The diagram below is that of a developing human foetus in the womb. Study the same and answer the questions that follow:
(a) Name the parts '1' to '5' indicated by guidelines.
(b) What term is given to the period of development of the foetus in the womb?
(c) How many days does the foetus take to be fully developed?
(d) Mention two functions of the parts labelled '2' other than its endocrine functions.
(e) Name any one hormone produced by the part labelled '2'.
The figure given below is the human female reproductive system. Study the same and answer the following questions.
(a) Label the guidelines 1 to 6 shown in the figure.
(b) What is the normal gestation period in human ?
(c) Where are the sperms released during coitus ?
(d) Write two important functions of part 2.
(e) Mention the technical term for the fixing of developing zygote to the uterine wall.
The diagram below represents two reproductive cells A and B. Study the same and then answer the questions that follow:
(a) Identify the reproductive cells A and B
(b) Name the specific part of the reproductive system where the above cells are produced.
(c) Where in the female reproductive system do these cells unite?
(d) Name the main hormone secreted by the (1) ovary (2) testes.
(e) Name an accessory gland found in the male reproductive system and state the function of its secretion.