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  • Last Modified 27-01-2023

NCERT Solutions for Class 11 Biology Chapter 18


NCERT Solutions for Class 11 Biology Chapter 18: Chapter 18, ‘Body Fluids and Circulation’ is an important chapter, and every Class 11 Biology student must cover this chapter in detail. In order to help the student with that, we have provided complete NCERT Solutions in this article. The solution set offered by Embibe is created by experienced experts and includes a good amount of research as well.

In addition, you will also find a comprehensive explanation for each question from Body Fluids and Circulation chapter. Students need a proper understanding of the chapter Body Fluids and Circulation to perform well in Class 11 examinations which will help in competitive exams like NEET. Also, students can download these NCERT solutions to study in offline mode. Continue reading to learn more.

NCERT Solutions for Class 11 Biology Chapter 18: Body Fluids and Circulation

We have provided the NCERT Solutions for Class 11 Biology Chapter 18 and a direct link to the NCERT Solutions for Class 11 Biology Chapter 18 downloadable free PDF to help the students prepare well for the exam. Finding the right books and solutions usually turns into a gruelling task with a plethora of links available on the Internet.

Download NCERT Solution for Class 11 Biology Chapter 18

Let us take a look at the sections and subsections of this chapter:

18.1.2Formed Elements
18.1.3Blood Groups
18.1.4Coagulation of Blood
18.2Lymph (Tissue Fluid)
18.3Circulatory Pathways
18.3.1Human Circulatory System
18.3.2Cardiac Cycle
18.3.3Electrocardiograph (ECG)
18.4Double Circulation
18.5Regulation of Cardiac Activity
18.6Disorders of Circulatory System

NCERT Solutions for Class 11 Biology Chapter 18: Chapter Description

Vertebrates circulate blood in their body to transport essential substances to the cells. It also carries waste substances from there. Blood is a special connective tissue consisting of a fluid matrix, plasma, and formed elements. Another fluid, lymph (tissue fluid), is also used for the transport of certain substances. Red blood cells, white blood cells, and platelets constitute the formed elements.

Human blood is grouped into A, B, AB, and O systems based on the presence or absence of two surface antigens, A, B on the RBCs. All these important topics are covered in this chapter. Students will also learn about hypertension, coronary artery disease, angina, heart failure, and coronary thrombosis.

Important topics: Blood, Circulatory system, Types of heart, Cardiac cycle, Blood vascular system.

Important Concepts: Blood Vascular system, Open circulatory system, Closed circulatory system, Human heart, Cardiovascular defects, and tissue fluid.

How To Prepare for Class 11 Biology: Body Fluids and Circulation

Once you have gone through the chapter from the NCERT textbook, try answering the exercise questions on your own. If you face any difficulty, refer to the solutions provided here. Once you feel confident about the chapter, you can take CBSE Class 11 Biology Chapter 18 mock test on Embibe.

You can also solve Body Fluids and Circulation practice questions on Embibe. Embibe offers all these for free. So, make the best use of these resources and master the chapter. This is a low weightage chapter from which about 1 to 3 questions can be asked every year.

CBSE Class 11 Biology Chapter 18- Important Questions

Some of the most important questions from this chapter are listed as follows:

1 Mark Questions From Body Fluids and Circulation
  1. Which of the four chambers of the human heart has the thickest muscular wall?
  2. What is RBC’s formed from in an adult human?
  3. What is the ECG technique?
  4. In which mammal, the RBC is nucleated?
  5. Name the double-layered membranous covering of the heart?
2 Mark Questions From Body Fluids and Circulation
  1. How is heart failure different from a heart attack?
  2. Why is a closed circulatory system considered advantageous?
  3. What is the name of the straw-colored fluid left after clotting of blood? How is it different from blood?
  4. Why is the swelling of feet of the leg caused when a person stands immobile for a long time?
  5. What is the average number of thrombocytes in the blood? What is their function?
3 Mark Questions From Body Fluids and Circulation
  1. What is the cardiac cycle?
  2. Differentiate between the right ventricle and left ventricle?
  3. Write a note on “Regulation of cardiac activity”?
  4. Why does lymph contain much fewer proteins than blood plasma? Name the two principal lymph vessels in humans.
  5. Differentiate between arteries and veins.
5 Mark Questions From Body Fluids and Circulation
  1. Describe the structure of the human heart.
  2. What is the lymphatic system? Discuss its importance.
  3. Explain double circulation with the help of a diagram.

FAQs Regarding NCERT Solutions for Class 11 Biology Chapter 18

Q1: Where can I find the complete Chapter 18 from Class 11 Biology of the NCERT book?
Ans: Students can read the complete Chapter 18 of Class 11 Biology NCERT Book on the embibe platform for free. Students can also find direct links to Class 11 Biology Chapter 18 Notes, Solutions, practice paper, mock tests, important questions, and much more.

Q2: Which is the Breathing and Exchange of Gases in NCERT Class 11?
Ans: The NCERT Class 11 Chapter 18, Body Fluids and Circulation deals with the transportation of Blood, which is a special connective tissue used for transporting essential elements, nutrients, and oxygen to the cell. The blood is made of plasma, fluid matrix, and formed elements.

Q3: Which is the best solution for NCERT Class 11 Chapter 18 Biology?
Ans: Students can find 100 per cent accurate Solutions for the NCERT Class 11 Biology Chapter 18, Body Fluids and Circulation on the Embibe platform. This article contains the complete solution which has been solved by expert Biology teachers associated with Embibe.

Q4: What is the CBSE Grade 11 biology Chapter 18?
Ans: NCERT Grade 11 Biology Chapter 18, Body Fluids and Circulation, which can easily be downloaded from the Embibe platform. This chapter belongs to Unit 5 of Human Physiology. Unit 5 consists of 7 chapters in total out of which chapter 18 Body Fluids and Circulation is one. The whole 5th unit carries 18 marks as a whole in the year-end examinations, while it holds massive 20 percent marks in the NEET examinations.

Q5: Where and how can I download the NCERT solutions of CBSE Biology Class 11 Chapter 18 Breathing and Exchange of Gases?
Ans: The NCERT Solutions of CBSE Biology Class 11, Chapter 18 Body Fluids and Circulation can be found in this article as designed by the subject experts and professionals who are associated with Embibe and have significant experience in the field of teaching and know the entire course thoroughly.

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