BioD_152_module_4.docx

Question 1 2 / 2 pts Which body system supplies cells with oxygen and nutrients and carries away waste? Nervous system Respiratory system Urinary System Correct! Circulatory System (Other system do one of the above, but only the circulatory system carries out all functions listed above) Question 2 0 / 2 pts The pericardial cavity contains in the: You Answered Lungs Correct Answer Heart Descending aorta Circle of Willis Question 3 2 / 2 pts Which layer of heart is composed of the contractile cardiac muscle? Pericardium Endocardium Correct! Myocardium Mediastinal Question 4 3 / 4 pts What is the purpose of the fossa ovalis in a fetus? Your Answer: fossa ovalis is a shallow depression on septum and seperates atria. it allows fetal blood to directly move from right atrium to the left The fossa ovalis marks the place of an opening between the atria which is present in all developing fetuses. It allows fetal blood to move directly from right to left atrium, bypassing he undeveloped lungs. The fossa ovalis closes during birth so that the lungs can receive oxygen once the baby is born. Question 5 10 / 10 pts Label the figure below (A-E): A: B: C: D: (In blue) E: Your Answer: A) superior vene cava B) right atrium C) tricaspid valve D) left ventricle E)pulmunary valve