LAB 11 - Fetal circulation

Question 1

Foramen ovale

Answer 1

• connects the right and left atria

- postnatal structure is the fossa ovalis

Question 2

Ductus arteriosus

Answer 2

• connects pulmonic trunk to the aorta

- postnatal structure is the ligamentum arteriosum

Question 3

Ductus venosus

Answer 3

• connects the umbilical vein to the inferior vena cava

- postnatal structure is the ligamantum venosum

Question 4

Deoxygenated blood in the fetal r. atrium can go into the r. ventricle or go directly into the ____ ______ via a small hole, the _______ _____

Answer 4

• L. atrium

- foramen ovale

Question 5

Deoxygenated blood that makes it into the r. ventricle of the fetal heart can then move from the pulmonary trunk into the lungs, or from the pulmonary trunk directly into the _____ ____ via a small vessel, the ______ __________.

Answer 5

• aortic arch

- ductus arteriosus

Question 6

Where is the fetal blood oxygenated?

Answer 6

-placenta

Question 7

Oxygenated blood coming from the placenta is delivered to the fetus via the ________ ____ which form anastomoses with the inferior vena cava via a short blood vessel, the ______ _______.

Answer 7

• umbilical vein

- ductus venosus

Question 8

Is the blood in the umbilical arteries oxygenated or deoxygenated?

Answer 8

-both (mixed)