شرح الدرس 6 Discover ديسكفر للصف الثالث الابتدائى ترم اول CHAPTER 2 MAKING A HEALTHY BODY الصف الثالث الابتدائى DISCOVER حل كتاب المدرسة ديسكفر للصف الثالث الابتدائى ترم اول ديسكفرى ثالثه ابتدائى شرح كتاب ديسكفر ثالثه ابتدائى words you do not know.MY HEART Your heart has an important job. It keeps blood moving through your body. Blood carries oxygen and nutrients to every part of your body. The heart is a muscular organ about the size of your fi st. It fi lls with blood when it expands, or stretches. When it contracts, or squeezes, it pushes blood out into blood vessels that run through the body. Blood returns to the heart from the body Blood returns to the heart from the body through the veins. It enters the right side of the heart. The heart then pushes blood to the lungs. Oxygen from the air we breathe is added to the blood in the lungs. Blood fi lled with oxygen travels from the lungs back to the heart. It enters the left side of the heart. The blood is then pumped to the rest of the body through arteries to deliver the oxygen and other nutrients.The heart beats many times per minute. Each beat pushes blood through the body. The heart continues to beat for your whole life. Write your own haiku about the heart.ABOUT MY HEART