what is the vein that goes from the yolk sac to the heart in an embryo?
the vitaline vein drains to the heart
cardinal veins ( anterior and posterior)
embryo into the heart.
where do umbilical veins drain?
drain into the heart
It passes through he liver
vitaline duck fo does th
Goes inside the intestine with yolk to feed us.
vitlaine arteries function
return the blood to the yolk sac from the embryo
what is the allantois?
the embryonic excretory bladder
what are the contents of the umbilical cord/belly button of an embryo?
the viteline artery, vitaline vein, vitaline duct, the umbilical artery, umbilical vein, and allantois, and the primordial germ call of in early embryonic stage
what happens to the yoke sac
it disappears as the embryo grows and feeds on it
what vessel brings the good blood/oxygenated blood to the fetus
the veins bring in the nutrients
what vessel brings the bad blood/deoxygenated blood away from the fetus
what does the viteline vein becomes in the adult?
the portal vein.
what does the viteline arties becomes in the adult ?
The celiac truck, the superior and inferior mesenteric
what does the viteline veins become
the portal vein
what does the viteline artery become
SMA.IFA, and celiac trunk
what is the fibrous pericardium of the heart and extension of?
what fetal structure does the ligamentum arteriosum stem from
the ductus arteriosus
what is the fossa ovalis?
how blood from the right atrium goes into the left atrium to bypass the lungs
what does the ductus arteriosus do?
help the blood to bypass the lungs and go into the aorta
what are the two bypasses of the heart in the embryo?
the foremen ovalis and the ductus arteriousos
what kind of blood is in the ductos arteriosus
a mixture of oxygenated and deoxygenated blood
what is the ligamentum venosum?
an embryonic remnant of the ductus venosus
how does the heart start off?
It is originally 2 tubes that fuse together
what is the bulbus cordis?
aortic vestibule of the left ventricle
conus arteriousos of right ventricle
the early atrium create which part oft he heart?
the auricles/pectinate uscle of left and right atria
smooth wallof left atrium
what does the sinus venous become?
the coronary sinus
and part of the right atrium
what kind of arteries are connected to the embryonic heart?
the truncus arteriosus
How many arteries make up the truncus arteriosus
what veins drain inside the sinus venousus?
the viteline veins (L+R), the umbilical veins( L+R), and the cardinal veins(anterior+ common +posterior)
what structure(s) does the bulbus cordus becomes in the adult heart?
aortic vestibule and of left ventircle and the consu arterious
the smooth part of the right atrium is formed from which embryonic structure?
The right part of the sinus venousus
what are septa
seperation for chamber
what are ostea?
how is the foramen ovalis formed
by apoptosis of the connection of the septum primum and the endocardium cushion as well as the failure of the septum secondium to form
the first septum to grow in the aria of the heart toward the left side
endocardial cushion function
makes cytoskeleton of the heart
create the membranous septum to block off blood between the two ventricles
it also forms the mitral value and the tricuspid valves
where does the muscular septum stem from
the wall of the heart. this part grows up to meet the membranous septum
how is the aorta and pumonary truck formed ?
from the aortic pulmonary septum in the truncus arteriosisus after it twists
what are the steps for the formation of the heart during embryology & the week that they happen ?
1) Cranial lateral plate mesoderm initiated vasculogenesis to form lateral endocardial tubes
2)Lateral body folding brings endocardial tubes and surrounding cardiogenic mesoderm together
3) Endocardial tubes surrounded by myocardium fuse to form primary heart tube (divided into incipient chambers by sulci)
4)Myocardium invests endocarditis heart tube and forms cardiac jelly
5) Heart begins to beat and loop
6) cardiac looping is looping is complete
7) Septum primum forms
8)Muscular ventricular septum begins to form
9) Endocardial cushian tissues form
10) definitive aria and aricles
11) Aortic and Pulmonary outflow tracts are fully separated by fusion of outflow tract cushion
What is cardiac looping ?
elongation and c-shaped bending of the heart tube
elongation of the atrial and venous poles cause a S-shaped cnfiguration
end result is 4 primitive chambers
how is the mature atrial septum formed ?
fusion of the embryonic spetum primum and septum secundum
The embryonic sinus venosus becomes which two structures in the mature heart?
the right caudal dorsal wall of the developing atrium
Incorporation of the sinus venosus tissue into the dorsal wall of the right atrium results in remodeling of the right atrial chamber and the formation of the right atrial appendage (the right auricle ).
what early embryonic structure becomes the coronary sinus?
The left horn of sinus venousus
where does venous blood enter the embryonic heart?
the common cardinal veins
what embryonic structure becomes the mitral and tricuspid valves?
The atrioventricular cushion tissue
( during 5th and 6th week)
what is the short trunks of the common cardinal veins formed from?
paired posterior cardinal veins ( draining the trunk)
paired anterior cardinal veins ( draining the head region)
what veins drain the yolk sac?
Vitelline veins drain the yolk sac
what vessels deliver oxygenated blood to the heart from the placenta?
The pair of umbilical veins
sinus venous components?
the sinus venous is at the caudal (tail end) and consists of the left anf right sinous horns ( into whichh the common cardinal veins drain)
Which structure becomes the pulmonary trunk and ascending aorta?
The truncus arteriosus
what is the truncus arteriosus
the distal outflow tract of the heart
distal outflow tract
embryonic structure that becomes the pulonary trunk and ascendin aorta
it is connect at its cranial end to a dilated expansion called th aortic sac
what do the superior and inferior caval veins becomes in the dult heart ?
The iferior an superior vena cavas
what process allows the aort and pulmonary trunk to be in the correct orientation after developing from the distal outflow tract?
a twisting process that result in a helical arrangement
ahd then there is a septum that devided them ( aortic septum
the great cardiac vein anastomoses with
The middle cardiac vein
the aorta is more towards which side of the body?
which artery is behind the duodenum ?
The gastro duodenal
which artery is behind the stomach
the splenic runs deep to the stomach
whcih arteries run near the greater cirvature of the stomach
left and righ gastroommental akak gastroepipolic arties