Fetal%20Heart

1
Class Topics
Title Anat Phys 4/5/07
Objectives

• .

• Fetal Heart
• Heart physiology
• Heart coloring
• There are two types of teachers the kind that
  fill you with so much quail shot that you cant
  move, and the kind that just gives you a little
  prod from behind and you jump to the skies.
• Robert Frost

Tuesday, July 31, 2018 852 PM
2
Class Assignments
By When
What

• Heart coloring 4/11/07
• Heart coloring W.S. 4/11/07
• Heart test 4/13/07
• Due this class period
• Due next class period
• Due in the future

3
Fetal Heart

• Foramen ovale
• hole between the right and left atrium
• Ductus arteriosus
• blood vessel between the pulmonary trunk and
  aorta
• Both of the above close when the first breath is
  taken
• change of pressure

4
Cardiac Muscle

• Can beat on its own
• If two fibers touch, they beat together
• Intercalated discs
• Allow for electrical transfer to other cells.

5
Heart Physiology

• Each beat is stimulated by an area in the right
  atrium near the superior vena cava called the
  Sinoatrial Node (SA Node).
• SA Node is innervated by the autonomic nervous
  system
• Pacemaker of the heart
• Stimulates both atria to contract

6
Heart Physiology

• SA Node sends impulse to the AV
  (atrioventricular) Node.
• Located in the interatrial septum
• Holds impulse for a short time (milliseconds) and
  passes electrical impulse to AV Bundle (Bundles
  of His)
• AV Bundles passes impulse to Purkinje fibers
  which stimulates the ventricles to contract

7
FromL http//www.personal.dundee.ac.uk/jrelliot/H
TML1/heart.htm
8
List of things to color

• Right atrium
• left atrium
• right ventricle
• left ventricle
• myocardium
• epicardium
• endocardium
• oxygenated vessels
• deoxygenated vessels

9
5
10
25
11
Blood flow

• Deoxygenated blood enters the heart from the
  inferior vena cava, superior vena cava, and the
  coronary sinus
• From rt atrium to rt ventricle through the
  tricuspid valve
• From rt ventricle to pulmonary trunk through the
  pulmonary semilunar valve

12
Blood flow

• From the pulmonary trunk to the rt and left
  pulmonary arteries to the lungs
• Oxygenated blood returns from the lungs in the
  pulmonary veins to the left atrium
• From the left atrium to the left ventricle
  through the bicuspid valve

13
Blood flow

• From the left ventricle to the aorta through the
  aortic semilunar valve
• From the aorta to the rest of the body
• Back to the right atrium through the inferior
  vena cava, superior vena cava, and coronary sinus

14
Link

• Gateway Community College http//www.gwc.maricopa.
  edu/class/bio202/cyberheart/hartint0.htm

15
From http//www.cardioliving.com/consumer/Heart/I
mages/Heart_Anatomy.JPG
16
From http//info.med.yale.edu/intmed/cardio/echo_
atlas/references/heart_anatomy.html