RADHIKA. S. (119)

INNOVATIVE- TEACHING MANUAL

      Name of the teacher: Radhika.S                                                               Std         : IX

        Name of the subject: Biology                                                                   Date       : 27.8.14

        Name of the Unit     :Circulatory pathways                                               Duration:45 minutes

        Name of the lesson :The heart beat

CURRICULAR STATEMENT

 Develops different dimensions of knowledge,process skills and attitudes on heart beat through lecture,group discussion, model analysis and evaluation by questioning and giving assignments.

CONTENT ANALYSIS

TERMS              : Heart,cardiac muscle,heart beat,pacemaker,cuspid       valves,atrium,ventricle,semilunar valves,systole,diastole,pulse,systolic pressure,diastolic pressure

FACTS               :1.Due to rhythmic contraction and relaxation of cardiac muscles blood enters and     leaves the heart.

                           2.Sino-atrial node is called the pacemaker of heart.

                           3.Blood flows uninterruptedly from heart due to continous beating of heart.

                           4.Veins bringing blood from various organs of body open into the atria.

                           5.When atria are filled with blood,they contract simultaneously.

                           6.Function of cuspid valves is to control the flow of blood between the atria and                   the ventricles

                           7.Contraction of heart chambers is called systole.

                           8.The state of rest of heart is called diastole.

                           9.The rhythm of heart beat is called pulse.

                           10.Blood pressure consists of systolic pressure and diastolic pressure.

CONCEPTS

MAJOR CONCEPT: Blood flows uninterruptedly from the heart due to the continous beating of heart.

MINOR CONCEPT:

1.The movement of heart muscle is initiated by pacemakers.

2.The contraction of heart chambers is called systole and the state of rest is called diastole.

3. Blood pressure consists of systolic pressure and diastolic pressure.

LEARNING OUTCOMES:

Enables the pupil to develop,

I. factual knowledge on heart beat through,

a. recognizing the lub and dub sound during a heart beat

b. recalling terms like heart beat blood, circulation, contraction, relaxation.

II. conceptual knowledge on heart beat through,

a. understanding the functions of the tricuspid and bicuspid valves.

b. explaining the process of contraction and relaxation of atrium and ventricles.

III. procedural knowledge on  heart beat through,

a. differentiating the terms systole and diastole.

b. inferring  the areas where pulse can be felt in the body.

IV. meta cognitive knowledge on heart beat through,

a. recogniszing the pressure of two atrium and two ventricles in heart.

b. inferring the presence of systolic and diastolic pressure.

V. scientific attitude towards the topic heart beat.

VI. different process skills like,

a. identifying the areas where pulse can be felt in body.

b. communicating about the path of blood flow through heart.

c. observing the model of heart to know the internal structure

TEACHING LEARNING RESOUCES

PLACARD

1. a placard describing about pacemaker

2. a placard to describe the systolic and diastolic pressure

MODEL

1. model of heart to show the chambers of heart

ACTIVITY CARD

1. A activity card to write the parts of the body to tell the pulse rate.

REFERENCE

1. Text book of std IX, SCERT.

2. Hand book of std IX, SCERT.

CLASSROOM INTERACATION PROCEDURE

EXPECTED PUPIL RESPONSE

INTRODUCTION: Teacher checks the previous knowledge of students by asking the names of the chambers of heart. Then students are asked how the blood is continousely pumped to various parts of the body. Have you heard about heart beat ? PRESENTATION: ACTIVITY 1. A placard is given to students to read about the description of pacemaker. Then the teacher explains about it. ·         A special type of muscle at upper part of right atrium initiates movement of heart muscle ·         This part is called sino-atrial node ·         Any damage to pacemaker will affect the rate of heart beat Consolidation: Special muscle on the upper part of the pacemaker of heart ACTIVITY -2 A model of heart is shown, to explain the various chambers and the flow of blood through the atrium and ventricles of the heart. Sudents are divided into groups and asked to write down the names of the valves present inside heart and one student from each group is asked to readout the answer. CONSOLIDATION: Bicuspid and tricuspid valves control the flow of blood inside heart . A hear beat consists of systole and diastole. ACTIVITY -3 Activity card is given to students, divided into groups and asked to write down the parts of the body, where the pulse can be felt. Students are asked to read out the answer. CONSOLIDATION: The rhythm of heart beat is called pulse. ACTIVITY-4 A PLACARD is given to students to read about the description of systolic pressure and diastolic pressure. Then the teacher explains about systolic and diastolic pressure. CONSOLIDATION: When ventricles contract, blood exerts pressure on walls of artery called systolic pressure during diastole, pressure on walls of arteries reduced called diastolic pressure. CONCLUSION The teacher asks the students to discuss and consolidate the rhythm of heartbeat and also about  blood pressure.

Blood is pumped by heart. Yes, heard about heart beat. Students reads about the pacemaker Students discuss in groups and writes the names of valves like tricuspid and bicuspid valves Students write the answers like ankles, part of the lower jaw, either side of forehead A students reads about systolic and diastolic pressure

REVIEW QUESTIONS:

1. What are the muscles of heart called?

        2. What is the special type of muscle on upper part of atrium called?

3. What is the function of cuspid valves?

4. What is the rate of heart beat in a normal adult?

5. What are the areas of body where pulse can be felt?

6. What is the rate of normal systolic and diastolic pressure?

7. Name the instrument to measure blood pressure?

FOLLOW-UP ACTIVITY:

Write down the functions of tricuspid and bicuspid valves inside heart?