introduction pa 481 c clinical anatomy & physiology dr. tony serino “the nature of the body is...
TRANSCRIPT
Introduction
PA 481 C
Clinical Anatomy & Physiology
Dr. Tony Serino
“The nature of the body is the beginning of medical science.”
Hippocrates ~350 B.C.E
Anatomy & Physiology
• Anatomy –study of body structures and their relationships
• Physiology –study of body mechanisms (homeostasis)
• Andreas Vesalius’s De Humani Corporis Fabrica (On the Fabric of the Human Body) 1543 AD; was the founding work on which Anatomy is based
Types of Anatomy• Regional Anatomy –study of body structure by focusing
on a specific part, region, or subregion including all of its systemic features. Useful for:– Understanding 3D arrangements of structures
– Layers of the body
– The relationships among its structures
• Surface Anatomy –study of body surface, referencing what lies beneath– Useful for visualization of internal anatomy
– Used in medical diagnosis (palpation) and treatment
• Systemic Anatomy –study of body structure focusing on organ systems– The way most undergrad anatomy is taught
Systems and related Medical Field• Integumentary Dermatology
• Skeletal Osteology
• Joints Arthrology
• Muscular Mycology
• Nervous Neurology
• Circulation Angiology
• Heart Cardiology
• Digestion Gastroenterology
• Respiratory Pulmonology
• Urinary Urology
• Reproductive Gynecology (female), Andrology (male)
• Endocrine Endocrinology
Orthropedics
Body Plan• Tube within a tube
• Internal vs. External environment
• Bilateral Symmetry
• Dorsal Hollow Nerve cord
Body Cavities: spaces within internal environment
(Peritoneal cavity)
Serous Membranes & Mesenteries• Mesothelium (simple squamous epithelium) lining the
body cavities (parietal) and their organs (visceral)• Each membrane is named for the cavity it lines• Form double membranes which suspend organs within
cavities• True mesenteries connect the body wall to the organ• Ligaments connect organ to organ
Visceral vs. Parietal
Parietal membrane
Body Cavity filled with serous fluid
Visceral membrane
Pericardium
Pleura
Parietal Pleura
Visceral Pleura
Pleural cavity
Parietal Peritoneum
Peritoneum
Visceral PeritoneumPeritonealcavity
Body Plan
Body Planes
• Tube within a tube
• Bilateral Symmetry
• Dorsal Hollow Nerve cord
Anatomical Position
Body Plan
• Tube within a tube
• Bilateral Symmetry
• Dorsal Hollow Nerve cord
Anatomical directions.
Anatomical Variation
• Anatomy described here represents 70% of the population
• Expect variation in specimens
• Veins vary most, arteries and nerves the least.
Ooops! Didn’t expect this in the abdomen.
Things one never wants to hear in the OR.
Homeostasis
• Maintenance of a constant internal environment
• Uses a reflex arc to self regulate
• Reflex functions to maintain a certain set point with a narrow physiological range
Set Point and Range
Factors Affecting Homeostasis
• Feedback –negative or positive
• Feed-forward regulation
• Acclimatization
• Biorhythms
Body Fluids
Transcellular fluids are filtrates of the plasma
Important Ions
Systems Overview
• Next few lectures will deal with anatomy and physiology that is represented throughout most regions of the body.
• Systems include: Integument, Skeletal, Muscular, Vessels (CV and Lymphatic), and Nervous Systems