A woman uses a device X made of a common metal for preventing pregnancy. This device works by preventing the implantation of fertilised egg cell (or embryo) in the female organ Y.
(a) What are the two names of device X?
(b) Name the organ Y.
(c) Can this method of contraception protect a woman from acquiring a STD?

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Solution

(a) The name of the device Y is copper-T or IUCD.

(b) The organ Y is the uterus.

(c) This method cannot protect a woman from acquiring STDs.

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Q. The human males use a device X made of a very thin rubber sheet as a covering on the male organ to prevent pregnancy. This device traps the gametes Y in it. In order to prevent pregnancy, the human females use a device Z which is a circle of rubber with a metal spring around it. The device Z is put inside the vagina to cover the cervix. It stops Y from going into the uterus.
(a) What is device X?
(b) What are Y?
(c) Name the device Z.
(d) What is the general name of these methods of birth control (or preventing pregnancy)?
(e) The use of which contraceptive device, X or Z, can protect the persons from sexually transmitted diseases?

Name the two devices that are fitted inside the uterus to prevent the implantation of an embryo.

Intra-Uterine Devices (IUDs) stop fertilisation and prevents implantation of the embryo.

(a) What is the name of the surgical method of birth control in human males in which the sperm ducts are cut and ligated (tied) at both ends?
(b) What is the name of the surgical method of birth control in human females in which the oviducts are cut and ligated (tied) at both ends?
(c) Name the contraceptive device used by the human males which act as a sheath over the male organ and traps the sperms in it.
(d) Name the contraceptive device used by human females which are put over the cervix.

Q. A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.
(a) Name the device X.
(b) What is the source of energy which cooks food in this device?
(c) What is the name of the process which traps energy in this device?
(d) State one advantage (other than saving on fuel) or using such a device for cooking food.

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(a) The name of the device Y is copper-T or IUCD. (b) The organ Y is the uterus. (c) This method cannot protect a woman from acquiring STDs.

(a) The name of the device Y is copper-T or IUCD.

(b) The organ Y is the uterus.

(c) This method cannot protect a woman from acquiring STDs.