NATURE-STUDY LESSONS. S 



14. («) Using a mirror, examine the inside of the 



mouth. 

 (d) Describe the parts observed. 

 (c) Make drawings of the parts and investigate 



the use of each. 

 T/ie Trunk. 



15. Observe its general shape. 



16. Show the appropriateness of the name. 



17. Describe its framework. 



18. {a) Discover what prevents this part of the body 



from being jarred, for example, when one 

 jumps from a fence. 

 {U) Examine the skeleton of the body if available. 

 The Upper Extremities. 



19. Observe the three divisions (upper arm, fore-arm 

 and hand) into which each of the arms naturally falls. 



20. Move the arm in different ways. Feel the joints. 



21. {a) Discover the different kinds of joints. 

 {b) Which joints act like a hinge ? 



(c) Which ones act like a ball in a socket ? 



22. Compare the parts of the upper limbs with the 

 corresponding divisions of any of the domestic animals. 



The Lower Extremities. 



23. Observe the divisions of the lower limbs — thigh, 

 leg and foot. 



Practise the correct use of the names of the parts. Do not speak of 

 the leg when you mean the thigh. 



24. Discover how these parts are joined to one another. 



25. Observe the way in which the different joints move. 



26. Compare the knee-joint with the elbow-joint, and 

 the hip-joint with the shoulder-joint. 



27. Compare the divisions of the lower limbs with the 

 corresponding divisions of the limbs of domestic animals. 



