Sternum Heart Pelvis Testis Fem Skeletal system Endocrine system Spinal Nervous system Respiratory system Lymphatic/Immune syste FIGURE 49.5 Vertebrate organ systems. The 11 principal organ systems of the human body are shown, including both male and female reproductive 986 Part XIlI Animal Form and Function986 Part XIII Animal Form and Function Skull Sternum Pelvis Femur Brain Spinal cord Nerves Skeletal system Circulatory system Endocrine system Nervous system Respiratory system Lymphatic/Immune system Trachea Lungs Lymph nodes Spleen Lymphatic vessels Testis (male) Ovary (female) Pituitary Thyroid Thymus Adrenal gland Pancreas Arteries Veins Heart FIGURE 49.5 Vertebrate organ systems. The 11 principal organ systems of the human body are shown, including both male and female reproductive systems