Anatomy and Physiology By: Gabriela Alvarez The Human Body Human body has a head, neck, trunk (thorax, abdomen), two arms and hands and two legs and feet. Studying the human body involves anatomy and physiology. Physiology is the study of function in the human body. Homeostasis, nerves There 12 systems in the human body Anatomy is the study of structure in the human body Location of bones Composition of body Composition The body is composed of: 3% nitrogen 10% hydrogen 18% carbon 65% oxygen Body contains abut 65% water Anatomical terms Superior: top The head is superior to the feet Inferior: bottom The feet are inferior to the head Anterior: front The eyes are anterior to the back of the head Posterior: back The eyes are posterior to the nose Medial: middle The heart is medial to the left arm Lateral: sides The left arm is lateral to the heart. Systems of the body Integumentary: skin, hair, nails Skeletal: bones supporting body and organs Nervous: collects and process info through nerves and the brain. Cardiovascular: heart pumping blood Endocrine: hormones Muscular: muscle movement Lymphatic: supplies fluid to blood Respiratory: delivers oxygen to blood Urinary: removes waste Reproductive: sex organs Digestive: processes food Immune: fights off diseases. Homeostasis Regulates internal environment Nervous system helps with transmitting info from body to brain Endocrine system releases hormones to regulate blood pressure and volume Cell metabolism maintains blood pH. Maintains a stable temperature and acid balance pH (7) This is needed so the body can function properly.