Human Anatomy and Physiology Flashcards
ANATOMICAL POSITION
STANDARD POSITIONING OF THE BODY AS STANDING; FEET TOGETHER; ARMS TO THE SIDE; WITH HEAD, EYES, AND PALMS OF HANDS FORWARD
WHAT ARE THE ANATOMICAL PLANES
THERE ARE 3
CORONAL/FRONTAL
TRANSVERSE
SAGITTAL/MEDIAN
HOW IS THE CORONAL PLANE DIVIDED
FRONT AND BACK DIVISION. TERMS USED ARE ANTERIOR AND POSTERIOR
HOW IS THE TRANSVERSE PLANE DIVIDED
TOP AND BOTTOM DIVISION. TERMS USED ARE SUPERIOR AND INFERIOR
HOW IS THE SAGITTAL PLANE DIVIDED
LEFT AND RIGHT DIVISION
DEFINE PROXIMAL AND DISTAL
PROXIMAL INDICATES A STRUCTURE IS CLOSER
DISTAL INDICATES A STRUCTURE IS FARTHER
DEFINE MEDIAL AND LATERAL
MEDIAL MEANS TOWARD THE MIDLINE
LATERAL MEANS AWAY FROM THE MIDLINE
MAIN FUNCTION OF THE RESPIRATORY SYSTEM
TO PERFORM THE CRITICAL TASKS INVOLVED IN TRANSPORTING OXYGEN FROM THE ATMOSPHERE INTO THE BODYS BLOOD AND REMOVING CARBON DIOXIDE FROM THE BODYS CELLS.
ALVEOLI
TINY AIR SACS IN THE LUNGS WHERE EXCHANGE OF OXYGEN AND CARBON DIOXIDE TAKES PLACE. LOOKS LIKE GRAPES. TYPE 1 ALVEOLAR CELLS MAKE UP THE ALVEOLAR WALL, TYPE 2 ALVEOLAR CELLS RELEASE A LIPOPROTEIN CALLED SURFACTANT, A SUBSTANCE THAT REDUCES THE SURFACE TENSION. THE WALLS OF ALVEOLI ARE THIN TO INCREASE THE RATE OF DIFFUSION
TRACHEA
THE WINDPIPE, WHICH CONNECTS THE LARYNX TO THE LUNGS
PATHWAY OF AIR
AIR ENTERS THROUGH NASAL OPENINGS, MOVES INTO THE NASAL CAVITY, AND TRAVELS PAST THE PHARYNX (THROAT) AND INTO THE TRACHEA WHICH IS A LARGE TUBE REINFORCED BY CARTILAGE RINGS THAT KEEP IT FROM COLLAPSING. AIT CONTINUES TO THE FIRST DIVISION OF THE TRACHEA; THE RIGHT AND LEFT PRIMARY BRONCHI. THE AIR IN THE RIGHT BRONCHUS CONTINUES TO THE RIGHT LUNG; THE AIR DIRECTED TO THE LEFT BRONCHUS CONTINUES TO THE LEFT LUNG
HEART
MUSCULAR ORGAN THAT PUMPS BLOOD THROUGHOUT THE BODY. LOCATED IN THE MEDIASTINUM WHICH IS THE ARE BETWEEN THE TWO LUNGS MARGINALLY ON THE LEFT SIDE WHICH ALLOWS THE RIGHT LUNG MORE SPACE. THE RIGHT LUNG HAS THREE LOBES (SUPERIOR, MIDDLE, INFERIOR), THE LEFT LUNG HAS TWO (SUPERIOR,INFERIOR)
PLEURA
EACH LUNG IS CONTAINED WITHIN A TOUGH PROTECTIVE DOUBLE MEMBRANE CALLED THE PLEURA AND CONTAINS PLEURAL FLUID
TIDAL VOLUME
THE AMOUNT OF AIR BREATHED IN AND OUT OF THE LUNGS DURING A NORMAL BREATH
IMMUNE SYSTEM
A SYSTEM THAT PROTECTS THE BODY FROM DISEASE CAUSING AGENTS KNOWN AS PATHOGENS BY RESPONDING TO SUBSTANCES ON THE SURFACES OF AGENTS THAT THE BODY PERCEIVES AS FOREIGN