The heart is a ____ that pumps ____ around the body. It has ____ chambers which are separated by ____ to stop the blood flowing backwards. ​ The ____ side of the heart contains deoxygenated blood and pumps blood to the ____. The ____ side of the heart has a thicker muscular wall because it pumps oxygenated blood around the ____.

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟