U2 day 5

Question 1

Serous membrane around heart

Answer 1

pericardium, 3 layers, fibrous pericardium, partial pericardium, visceral pericardium

Question 2

pericardial cavity

Answer 2

filled with serous fluid

Question 3

serous membrane for pulmonary area

Answer 3

pleura, parietal pleura on wall, visceral pleura on lung

Question 4

Blood flow through heart

Answer 4

Superior and inferior vena cava bring blood to right atrium, then to right ventricle and out pulmonary trunk to pulmonary a.a. and to lungs, then back in pulmonary V. into left ventricle, then out left ventricle into ascending aorta.

Question 5

blood supply to heart muscle

Answer 5

Blood travels to heart muscle though left and right coronary arteries, left branches into anterior interventricular branch of the left common coronary a. and circumflex branch of the left coronary a. Right coronary splits into posterior interventricular branch of the right coronary a. and marginal branch of the right coronary a. Vein return from heart muscle into the coronary sinus from the Great Cardiac vein that follows Ant. Interven. br. of L cor. a. and Middle Cardiac vein that drains Post. Interven. br. of R cor. a. these dump directly into the right atrium.

Question 6

fetal circulation

Answer 6

In placenta: moms blood and fetal blood come really close to each other for gas exchange and nutrient exchange but don’t touch, there are shuts to bypass unneeded things in fetus, liver shunt, and foramen oval and ductus arteriosus to bypass lungs.

Question 7

path to fetal heart from mom

Answer 7

descending aorta, common iliac a., internal iliac a., umbilical a.a., placenta, ductus venous (liver shunt), heart chambers, foramen oval, aorta and pulm a. then combine via ductus arteriosus and then goes to body.

Question 8

adult remnants of fetal shunts

Answer 8

ligamentum arteriosum from ductus arteriosus.
fossa ovalis from foramen oval.
ligamentum venosum from ductus venosus.