00:01
So when we speak about fetal circulation, i will write it as fetal c here representing fetal circulation.
00:07
Now this involves components such as umbilical cord written as uc, the blood vessels written as bv which are present within the placenta.
00:17
Placenta is the connection between the mother as well as the fetus or the child.
00:21
This carries the blood that is called as the fetal blood.
00:26
Now particularly when we speak about the fetal circulation, it is very large.
00:30
Different from that of the adult circulation.
00:32
Now this is a integrate system that allows fetus particularly to receive the oxygenated blood which is written as o2 blood here.
00:43
So it receives oxygenated blood along with the nutrients from the placenta which is compromised of blood vessels particularly within the placenta and there is two umbilical arteries which is written as ua and one umbilical vein which is written as ue so this is about the fetal circulation coming to the foramen ovala written as f oval so foramen ovala is basically the shunt that passes through the lungs now shunt that bypasses the lungs and it is called as foramen ola allows the blood to travel from the right atrium written as ra to the heart to the left atrium written as la and the ducts of arterials so what is duct of arterials is particularly written as duct a this allows the movement of the blood through the from the lungs to the right atrium to the left atrium of the heart so duct duct arteries helps in this and this also allows the blood to move from pulmonary artery written as pa to the iota which is written as iota here so that is allowed by the ducts of arteries carries oxygenated blood and nutrients as well so the important feature of ducts of arteries is that a normal blood vessel that connects to major arteries the iota the pulmonary artery is this ductor of iota and also this is facilitating blood to move away from the heart.
02:22
So that is a function of the ducts of iota and the pherom and ovalic.
02:29
So that answers the first part of the question.
02:33
So that is 20th one.
02:35
Coming to the 21st one, heart is from the tissues that is termed as mesoderm...