Question

developmental aspects of the heart complete the following statements are ready to missing turns it in the answer blanks.

-4. Feeble contractions, abnormal ryms TYPOK Developmental Aspects of the Heart 1. Complete the following statements by writing the missing terms in the answer blanks 21 22 25 1. - 2. The heart forms from a fusion of two pulsating tubes into a single chamber and is actively pumping blood by the_(1) _day of gestation. In just three more weeks it becomes a four-chambered double pump. The fetal heart rate is about_(2) Two fetal structures divert blood away from the collapsed, nonfunctional lungs. The shunt located in the interatrial septum is called the_(3) The other, called the_(4 .diverts blood from the_(52_to the aorta. Shortly after birth, these bypass structures become_06_ If these shunts remain patent, children exhibit_07 _during physical exertion. The adult heart benefits from regular_(8) which enhances the endurance and strength of the myocardium. Several age-related anatomical changes may occur in the heart. Heart murmurs in the elderly may signal sclerosis and thickening of the (9) arrhythmias may be a result of fibrosis of the_010)and atherosclerosis may lead to heart attack if the_() become occluded. The risk of cardiovascular disease is lowered if three dietary components are decreased. These are (12). (13) and_(14)

Answer 1

1. 21^st or 22^nd day

2. 120 to 160

3. interatrial septum.

4. interventricular septum.

5. right ventricle

6.closed.

7. shortness of breath

8. exercise

9. aortic valve.

10. cardiac muscle.

11.coronary artery

12. CHolesterol

13. LDL

14. ratio of total to HDL cholesterol