Class 12 Biology - Chapter Human Health and Disease NCERT Solutions | Name the primary and secondary lymphoid
Welcome to the NCERT Solutions for Class 12th Biology - Chapter Human Health and Disease. This page offers a step-by-step solution to the specific question from Exercise 1, Question 6: name the primary and secondary lymphoid organs....
Question 6
Name the primary and secondary lymphoid organs.
Answer
(a) Primary lymphoid organs include the bone marrow and the thymus.
(b) Secondary lymphoid organs are the spleen, lymph nodes, tonsils, Peyer’s patches of small intestine, and appendix.
More Questions From Class 12 Biology - Chapter Human Health and Diseas
- Q:- How does the transmission of each of the following diseases take place?
(a) Amoebiasis
(b) Malaria
(c) Ascariasis
(d) Pneumonia - Q:- Draw a well-labelled diagram of an antibody molecule.
- Q:- What are the various public health measures, which you would suggest as safeguard against infectious diseases?
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- Q:- What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?
- Q:- Differentiate the following and give examples of each:
(a) Innate and acquired immunity
(b) Active and passive immunity - Q:- How is a cancerous cell different from a normal cell?
- Q:- Discuss with your teacher what does a suitable gene means, in the context of DNA vaccines.
- Q:- In which way has the study of biology helped us to control infectious diseases?
Popular Questions of Class 12 Biology
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Name the parts of an angiosperm flower in which development of male and female gametophyte take place.
- Q:-
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________. - Q:- What do you think is the significance of reproductive health in a society?
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Recently Viewed Questions of Class 12 Biology
- Q:- Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
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- Q:- Correct the following statements:
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(b) All sexually transmitted diseases are completely curable.
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(b) Zooplankton
(c) Benthos
(d) Fishes - Q:- What is oogenesis? Give a brief account of oogenesis.
- Q:- In our society the women are often blamed for giving birth to daughters.
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2 Comment(s) on this Question
Anchal
2019-01-20 06:37:03
Explain it
Abhishek
2018-01-14 22:48:09
It is a super fast study center.
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