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Learn about the anatomy, physiology, diseases, and preventive measures related to the skeletal, muscular, and integumentary systems. Understand the role of joints, bones, muscles, and skin in movement, protection, and energy removal. Explore major diseases and disorders, along with age-related changes, and discover preventive measures.
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Chapter 7 Structure and Function of the Human Body
Definitions • Anatomy • Physiology • Diseases • Pathophysiology (continued)
Definitions • Etiology • Signs and symptoms • Objective • Subjective • Diseases and syndromes (continued)
Definitions • Diagnostic procedures • Diagnosis • Treatment • Prognosis • Prevention (continued)
Definitions • Wellness • Illness • Prevention • Primary • Secondary • Tertiary
Question • Which of the following is an example of objective data? • Headache • High blood pressure • Numbness in arm
Answer • B. High blood pressure • Objective data • Can be observed by health care worker • E.g., high blood pressure reading • Subjective data • Not directly observable and reported by patient • E.g., headache, numbness
Genetics • Inherited characteristics • Impact on medical disorders • Impact on body systems
Systems of the Body • Body system • When two or more organs combine to perform major body function • Interrelated • Maintain homeostasis or wellness
Movement and Protection • Skeletal, muscular, and integumentary • Provide support • Allow movement • Protect body
Skeletal System • Functions of bones: • Give shape to body • Provide place for muscles to attach • Protect internal organs • Store minerals • Manufacture blood cells (continued)
Skeletal System • Newborns have 270 bones • Adults have approximately 206 bones • Long bones • Short bones • Flat bones • Irregular bones
Bone Structure • Medullary canal • Diaphysis • Epiphyses • Periosteum • Red marrow • Cartilage
Axial Skeleton • Skull • Inner ear • Hyoid • Spinal column • Ribs • Sternum
Appendicular Skeleton • Shoulders • Arms • Hands • Pelvis • Legs • Feet
Joints • Articulation • Synovial fluid • Ligaments • Bursa • Joint types
Skeletal System • Major diseases and disorders • Preventive measures • Age-related changes
Question • Which of the following movements would be an example of adduction? • Raising the arm away from the side of the body • Turning the palm face upward • Pulling the leg toward the median
Answer • C. Pulling the leg toward the median • Adduction • Movement toward median plane of body • Abduction • Raising arm away from side of body • Supination • Turning palm face upward
Muscular System • More than 600 muscles • Cardiac (heart) • Skeletal • Smooth (visceral) • Sphincter (dilator)
Muscle Characteristics • Contractibility • Excitability (irritability) • Extensibility • Elasticity
Skeletal Muscle • Attached to bones by tendons • Fascia • Origin and insertion • Belly (continued)
Skeletal Muscle • Prime mover • Antagonist • Spasticity • Atrophy • Contracture
Muscular System • Major diseases and disorders • Preventive measures • Age-related changes
Question • True or False: • Gangrene is caused by a virus that kills muscle tissue.
Answer • False • Gangrene caused by bacteria that kills muscle tissue • Not virus
Animation Click Here to Play The Shoulder Injuries Animation
Integumentary System • Largest organ • Protects from environmental hazards • Controls temperature • Prevents dehydration • Skin and appendages
Layers of the Skin • Epidermis • Dermis • Subcutaneous tissue • Appendages
Animation Click Here to Play The Skin Animation
Integumentary System • Major diseases and disorders • Preventive measures • Age-related changes
Question • Which of the following is the outer layer of skin? • Dermis • Subcutaneous • Epidermis
Answer • C. Epidermis • Epidermis • Outer layer • Dermis • Second layer • Subcutaneous • Innermost layer
Energy and Removing Waste • Various systems: • Cardiovascular • Lymphatic • Respiratory • Digestive • Urinary
Cardiovascular System • Transports • Regulates temperature • Consists of heart and blood vessels • Arteries • Veins • Capillaries
Heart • Endocardium • Myocardium • Pericardium • Right and left atria • Right and left ventricles • Valves
Circulation • Flow of blood throughout body • Oxygenated and deoxygenated blood • Electrical system
Animation Click Here to Play The Heart Animation
Blood • Red blood cells (RBC) • White blood cells (WBC) • Platelets • Plasma
Animation Click Here to Play The Blood Animation
Cardiovascular System • Major diseases and disorders • Preventive measures • Age-related changes
Question • True or False: • The atrioventricular (AV) node is the natural pacemaker of the heart.
Answer • False • Sinoatrial (SA) node • Natural pacemaker of heart
Lymphatic System • Second transportation system • Consists of the following: • Lymph • Lymphatic ducts • Lymph nodes • Role of spleen • Immune response