Shows the position of the internal organs and the shape and structure of the head anatomy,and shows the main human anatomical systems such as breathing, digestion, urinary, and health.The right half of the head and neck shows the structure of the skull, masseter muscles, and temporal muscles. There are eyeballs in the orbit. A sagittal section of the head and neck is taken. The cranial cavity contains the right hemisphere of the brain. The oral cavity and larynx show the laryngeal cavity, the laryngeal compartment, the glottis, and the lateral lobe of the thyroid show parathyroid glands. The frontal cross-sections of the two lungs in the thoracic cavity show the structure of the lungs. The heart is anatomically dissected to show the similarities and differences of the left and right atrioventricular structures. The cardiovascular vessels include the upper and lower vena cava, pulmonary arteries and veins, and aorta, which are used to explain the size of blood circulation. Male and female organs are interchangeable, and each organ or structural part is marked with a number. Combining with the instructions is conducive to accurately understanding the organ structure of human anatomy, and is suitable for professional medical teaching, research and teaching. And on this basis, the internal structure of the human torso and back muscle anatomy is newly added to show the deep and shallow muscle anatomy of the human torso in detail