Question

Trace Blood Pathway.....

1) Rectum to Spleen

2) Lung of mother to inferior vena cava of fetus

Answer 1

1.The superior rectal vein, or superior hemorrhoidal vein, connects veins surrounding the rectum to the inferior mesenteric vein. The inferior mesenteric vein brings blood from the large intestines to the splenic vein.Blood in the spleen travels to the liver.

The rectal vein is the main link between blood exiting all veins around the rectum.

The splenic artery or lienal artery is the blood vessel that supplies oxygenated blood to the spleen. It branches from the celiac artery, and follows a course superior to the pancreas. It is known for its tortuous path to the spleen.

2. The ductus arteriosus moves blood from the pulmonary artery to the aorta.

Oxygen and nutrients from the mother's blood are sent across the placenta to the fetus.

The enriched blood flows through the umbilical cord to the liver and splits into 3 branches.

The blood then reaches the inferior vena cava. This is a major vein connected to the heart.

Most of this blood is sent through the ductus venosus. This is also a shunt that lets highly oxygenated blood bypass the liver to the inferior vena cava and then to the right atrium of the heart.

A small amount of this blood goes straight to the liver to give it the oxygen and nutrients it needs.