1. The Human Body: An Orientation

3. Level of Structural Organization Cellular level Cells are made of molecules Organismal body Human organisms are made up of many organ system Chemical level Atoms combine to form molecules Organ system level Organ systems consist of different organs That work together closely Organ level Organs are made up of different types of tissues Tissue level Tissues consist of similar types of cells

9. 8. Respiratory system (nasal passages, pharynx, larynx, trachea, bronchi and lungs ) 9. Digestive system ( oral cavity, esophagus, stomach, small and large intestines and rectum ) 10. Urinary system ( kidneys, ureters, bladder, and urethra ) 11.Reproductive system male - sperms are produced by the testes of the male. Other male reproductive system structures are the scrotum, penis, accessory glands, and the duct system, which carries sperms to the body. female - The ovary of the female produces the eggs, or ova. The female duct system consist of the uterine tubes, uterus and vagina.