Match the structures listed with their correct descriptions on the next page.

1. aorta-
2. aortic semilunar valve-
3. bicuspid valve-
4. chordae tendinae-
5. endocardium-
6. epicardium-
7. inferior vena cava-
8. left atrium-
9. left pulmonary artery-
10. left ventricle-
11. mitral valve-
12. myocardium-
13. papillary muscles-
14. parietal pericardium-
15. pulmonary artery-
16. pulmonary semilunar valve-
17. right atrium-
18. right pulmonary artery-
19. right ventricle-
20. superior vena cava-
21. tricuspid valve-
22. ventricular septum-
23. visceral pericardium

Explain why phospholipid molecules form a bilayer. (3 marks)

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.