Caudal end of foregut from dorsal mesentery

Two layers that border intraembryonic coelom

O-(genetic) herniation of organs thru enlarged umbilical ring (covered by amnion)

G- herniation of addominal contents thru body wall into amnionic cavity

Tissue that makes up mesentery

parietal and visceral layers of serous membranes (makes up dorsal mesentery)

ventral mesentery from thinning of septum transversum

septum transversum,

2 pleuroperitoneal membranes

muscular components of lat and dorsal body walls

mesentery os esophagus

Strucutre from which lung diverticulum arises

its an outgrowth of ventral wall of ofregut (endoderm origin)

muscular portion from splanchnic mesoderm

Emryonic tissue of origin for larynx

pharyngeal arches associated with larynx

S is PO4 lipid rich fluid loweing surface tension at air-alveolar interface

made by type II alveolar epithelial cells

TImeline of lung maturation before and after birth

Remember PCTA

Pseudoglandular period (5-16 wk)  when term. bronchiloes made and no resp bronchioles or alveoli present

Canalicular Period (16-26 wk) when term bronchioles divide again to make 2 resp bronchiles, which  divide to make 3-6 alveolar ducts

Terminal Sac Period (26 wk-birth) when terminal sacs (prim. alveoli) form, capillaries form

Alveolar Period (8 mo-childhood)  when amturue alveolie have divided and epi endotheilial capillary contact

CA rostral to BP membrane

PC plate caudal to BP membrane

V- b vessels from blood islands

A- sprouting of vessesls from existing vessels

Initially Heart Tube is anterio, with BP membrane posteriorly

AFterward HT posterio, and BP membrane is anterior

Origin of pericardial cavity

D is from mesodermal tissue attached to dorsal heart tube and later disappears to form transverse pericardial sinus

V doesnt exist ever

Truncus arteriosus

Bulbus cordis

Primitive ventricle 

truncus arteriosus

conus cordis

proximal segment

(prox seg makes right ventricle)

makes up the septa dev' in AV and conotruncal regions

Make: A and V septa (mem parts)

AV Canals ans valves

Aortic channels

pulm channels

muscular interventricular septum from apposed medial walls of expanding ventricle margins

Interventricular farement shrinks after formation of conus septum. Outgrowth of musc. intervent septum closes foramen to make mem part of IV septum by fusing with conus septum

sinus venarum at R atrium

coronary sinus

oblique vein of marshal

tissue that divides conus cordis and truncus arteriosus into two channels

originally in caudal left cardiac tube, then sinus venosus, then into R atrium at SA node

AV node from:

cells of left wall of sinus venosus

cells of AV canal

Vitelline artery which supplies yolk sac

derivatives are celiac, sup and inf mesenteric aa

umbilical a which carry DeO2 blood to placent

Der's are

common iliac a

internal iliac and sup vesical aa and med umb lig

Somatic (Parietal) mesoderm

Somatopleure 

Continuous around amnion

Line outside of the peritoneal, pleural, and pericardial cavities 

Splanchnic (Visceral) Mesoderm

Splanchnopleure 

Continous around yolk sac

 Cover the abdominal organs, lung and heart

umb v-duct venosus-IVC, Ra, f ovale, LA, LV asc aorta, desc aorta, umb aa.

closure of umb aa

   prox portion remains as sup vesical aa

   med umbilical lig's

closure of umb v and ductus venosus

   lig teres hepatis

   lig venosum

closure of ductus art goes to lig arter

closure of for ovale to fossa ovale

atrial septal defect

high or low

  high is osteum secundum defect

left is osteium primum defect

remember IHOP

I is interventricular septal defect

H is hypertroyphy of R vent

O is overriding aorta

P is pulm stenosis

sternum from what type of mesoderm?

IV disk from sclerotomal mesenchyme (annulus fibrosis) and notochord (nucleus pulp)

vert from sclerotome (from paraxial mesoderm)

type of mesoderm that gieves rise to smooth and cardiac muscle of thorax and abd regions

cardio form splanchnic mesoderm

smooth from lat plate meoderm and neural crest

external, internal, and innermost intercostals