Lecture XXI

• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD

  • fetal lungs are collapsed
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD

  • fetal lungs are collapsed
  • all gas exchange with environment and digestion done by mother
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. a: PLACENTA

  • organ that attaches to uterine wall
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. a: PLACENTA

  • organ that attaches to uterine wall
  • responsible for gas exchange, etc, with fetus
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. a: PLACENTA

  • organ that attaches to uterine wall
  • responsible for gas exchange, etc, with fetus
  • blood doesn't cross over
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. a: PLACENTA

  • organ that attaches to uterine wall
  • responsible for gas exchange, etc, with fetus
  • blood doesn't cross over
  • ex: A- blood type mom can might harm fetus with A+ blood if it were not for placenta
• Added Notes:

  • placenta can move on its own
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. b: UMBILICAL VEIN

  • inside umbilical cord
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. b: UMBILICAL VEIN

  • inside umbilical cord
  • runs oxygenated blood into fetus
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. c: DUCTUS VENOSUS

  • sends oxygenated blood to inferior vena cava
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. c: DUCTUS VENOSUS

  • sends oxygenated blood to inferior vena cava
  • blood mixes and is now mid or sorta high in oxygen
• Added Notes:

  • lungs collapsed until first breath
  • placenta for each delivery
• Added Notes:

  • portal veins only in adults
  • blood might mix because lungs collapsed
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. d: SYSTEMIC CIRCULATION

  • arterial blood has lower oxygen than adult
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. d: SYSTEMIC CIRCULATION

  • arterial blood has lower oxygen than adult
  • venous blood is similar to adult
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. e: HEART CIRCULATION

  • right atrium has deoxygenated blood in adults, but for fetus it has mixed higher oxygen blood
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. e: HEART CIRCULATION

  • fetus has mixed higher oxygen blood
  • opening for interatrial septum is called foramen ovale
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. e: HEART CIRCULATION

  • fetus has mixed higher oxygen blood
  • interatrial septum opening: foramen ovale
  • foramen ovale connects right atrium and left atrium
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. e: HEART CIRCULATION

  • fetus has mixed higher oxygen blood
  • interatrial septum opening: foramen ovale
  • foramen ovale connects right atrium and left atrium
  • blood bypasses lungs
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. e: HEART CIRCULATION

  • fetus has mixed higher oxygen blood
  • interatrial septum opening: foramen ovale
  • foramen ovale connects right atrium and left atrium
  • blood bypasses lungs
  • opening between pulmonary trunk and aorta called ductus arteriosus
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. e: HEART CIRCULATION

  • fetus has mixed higher oxygen blood
  • interatrial septum opening: foramen ovale
  • foramen ovale connects right atrium and left atrium
  • blood bypasses lungs
  • pulmonary trunk and aorta opening: ductus arteriosus
  • blood bypasses lungs
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. f: UMBILICAL ARTERIES

  • come off internal iliac arteries
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. f: UMBILICAL ARTERIES

  • come off internal iliac arteries
  • go to umbilical cord
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 1: GESTATION. f: UMBILICAL ARTERIES

  • come off internal iliac arteries
  • go to umbilical cord
  • deliver blood to placenta
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH

  • clamp or cut umbilical cord to stop blood flow
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH

  • clamp or cut umbilical cord to stop blood flow
  • umbilical arteries and umbilical veins vasoconstrict to prevent blood loss
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH. a: PRESSURE CHANGES

  • inflate lungs
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH. a: PRESSURE CHANGES

  • inflate lungs
  • changes pressure in thoracic cavity
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH. a: PRESSURE CHANGES

  • inflate lungs
  • changes pressure in thoracic cavity
  • vasodilate pulmonary trunk
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH. a: PRESSURE CHANGES

  • inflate lungs
  • changes pressure in thoracic cavity
  • vasodilate pulmonary trunk
  • vasoconstrict ductus arteriosus
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH. a: PRESSURE CHANGES

  • inflate lungs
  • changes pressure in thoracic cavity
  • vasodilate pulmonary trunk
  • vasoconstrict ductus arteriosus
  • foramen ovale closes
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 2: FIRST BREATH. a: PRESSURE CHANGES

  • inflate lungs
  • changes pressure in thoracic cavity
  • vasodilate pulmonary trunk
  • vasoconstrict ductus arteriosus
  • foramen ovale closes
  • lungs no longer bypassed, needs blood
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 3: CONVERSION TO ADULT STRUCTURES

  • umbilical arteries and umbilical veins become umbilical ligaments
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 3: CONVERSION TO ADULT STRUCTURES

  • umbilical arteries and umbilical veins become umbilical ligaments
  • ductus venosus becomes round ligament of liver
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 3: CONVERSION TO ADULT STRUCTURES

  • umbilical arteries and umbilical veins become umbilical ligaments
  • ductus venosus becomes round ligament of liver
  • foramen ovale becomes fossa ovalis
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 3: CONVERSION TO ADULT STRUCTURES

  • umbilical arteries and umbilical veins become umbilical ligaments
  • ductus venosus becomes round ligament of liver
  • foramen ovale becomes fossa ovalis
  • ductus arteriosus becomes ligamentum arteriosum
• I: VASCULATURE (BLOOD VESSELS). D: FETAL BLOOD. 3: CONVERSION TO ADULT STRUCTURES

  • umbilical arteries and umbilical veins become umbilical ligaments
  • ductus venosus becomes round ligament of liver
  • foramen ovale becomes fossa ovalis
  • ductus arteriosus becomes ligamentum arteriosum
  • all these changes are vital
• I: STRUCTURE. A: UPPER RESPIRATORY TRACT

  • conducting pathway
• I: STRUCTURE. A: UPPER RESPIRATORY TRACT

  • conducting pathway
  • process air
• I: STRUCTURE. A: UPPER RESPIRATORY TRACT

  • conducting pathway
  • process air
  • no gas exchange