Umbilical cord

Product name Umbilical cord
Cat. No. 0088800A
No. of samples 1
Description umbilical cord, normal
Age/Sex : 26/F
Price 197 EUR
260 USD
170 GBP

Umbilical cord

Product Related Literature

In placental mammals, (also known as the umbilical cord or birth code) umbilical cord is a conductor between the development of the placenta and the fetus or embryo. During the development of prenatal, umbilical cord is a part of the fetal genetic and physiological, the (human), 1 vein that was buried in the jelly of Wharton 2 arteries and normal (umbilical artery) (umbilical vein It is included,). Umbilical vein to supply oxygen of the fetus, the nutrient-rich blood from the placenta. In contrast, the heart pump the fetal nutrient depletion the blood through the umbilical artery back deoxygenation, the placenta from this.

Umbilical cord has been developed and will be contained residues (derived from the fertilized egg and therefore) the allantoic and yolk sac. This is the fifth week of fetal development at the time of the yolk sac as a source of nutrients to the fetus. Direct cable is connected to the circulation system of the mother without causing direct mixing Instead, it is not bonding of the transfer placenta material between the maternal blood. The length of the cord is approximately equal to the crown-rump length of the fetus during pregnancy. Generally, about 2 cm long about 50 cm (20 in.), diameter umbilical full term newborn is (0.75 inches). This diameter decreases rapidly in the placenta. Embedded in abundant ground substance metachromatic.The stained smooth muscle cells in the layer outer layer consisting placed in rings in the inner layer and smooth muscle cells showing cells arranged loosely unevenness rather,: complete umbilical artery patent, poorly differentiated, only a small muscle filament is included rather having a layer of two main, it is unlikely to contribute actively in the process of closure after birth.

The umbilical cord contains the gelatinous substance made jelly of Wharton, most of the mucopolysaccharides. Vein that carries nutrients of oxygen-rich blood to the fetus is included, this is, artery carrying two obezkisloroden, the nutrient depletion blood away. Blood vessels are present in the umbilical cord (arteries and veins) Sometimes, only two. It is associated with abnormal Occasionally, fetal, but it can be achieved without the problems associated. This vein carrying oxygenated blood is a rare and (in the example of the only other, is a connecting artery pulmonary pulmonary veins to the heart) arteries carry blood obezkisloroden. However, umbilical vein, reflecting the fact that carry blood to the heart of the fetus while carrying blood umbilical artery is away this naming convention. ML / min, blood flow in the umbilical cord is 240 ml / min at 40 weeks gestation about 35 20 weeks. And to adapt to the weight of the fruit, this is 115 ml / min / kg at 20 weeks, 64 ml / min / kg to support the 40 weeks.

Umbilical cord of the fetus is (or navel) navel, directly into (after separation) belly of place. The fetus, it is divided into two umbilical vein extends next to the slit of the liver. One of these branches, merges with the (connected to the branch on the left) hepatic portal vein, which carries blood to the liver. (Known as venous) a second portion that bypasses the liver and empty into the inferior vena cava carrying blood to the heart. The branches of the internal iliac artery to complete the circuit back to the placenta, umbilical artery 2 passes on either side of the bladder to the code.

In the absence of external intervention, the code is swelling the contraction of smooth muscle, depending on the temperature decrease of vasoconstriction, describes the collapse of the blood vessels and Wharton jelly, and hide physiologically shortly after birth. I means and is designed brackets to stop blood flow naturally, that. C in the air at 18 ° will be 3 minutes or less this tightening physiological. In the water supply when the water temperature is close to body temperature, pulse may be 5 minutes or longer, usually.

Closure of umbilical artery vasoconstriction is comprised of a plurality of the constriction and increased several times over time. There is a segment of the extension to trap blood nekoagulirala between constriction complete occlusion before. Both closure stenosis and the last part that was produced by muscle cells in the peripheral layer on mainly. It is believed that in contrast, after moving in the axial direction with ease, inner layer, and serve mainly as a tissue plastic can be folded to reduce the cavity to complete the closure. It appears to be mediated primarily by thromboxane A2 and hydroxytryptamine – vasoconstriction occlusion, 5. Oxytocin is more sensitive been one of long-term contracts and from artery of rope of premature infants to arachidonic acid and angiotensin II. Unlike the contribution of Wharton jelly, cooling causes a temporary vasoconstriction.
The child, venous and umbilical vein is close, degenerate fibrous remnants known as the round ligament of venosum ligament and liver, respectively. The remaining sections of the (modified to what is known as an intermediate link navel) part of each umbilical artery closes, it is retained as part of the circulatory system.