Date Range
Date Range
Date Range
Science For Sixth Primary- - Excretion in human. Is a process of getting rid wastes resulted from food burning inside the body cells . B- The urinary system .
الجهاز الهضمي The Digestive System. Q- Food must be chewed well. A- To break it down into smaller pieces and mix it with saliva, so food can be digested easily . Each of Pharynx and Oesophagus have no digestive functions. 2- Digestion in the Stomach. It is a muscular sac stores food. It has strong muscular walls. The muscles of stomach contract and relax to break down the food into small pieces.
Science For Sixth Primary The Circulatory System. The Circulatory System الدورة الدموية. It is a strong hollow muscular organ , its size is a bout the clenched fist. The two sides are separated from each other by muscular wall to prevent the mixing of the blood between them. They found in the upper part of the heart, they are right atrium and left atrium.