71.  Which of the following structures originates as an evagination from the floor of the pharynx, moves into the neck, and loses its connection with the pharynx?  
A.  pancreas
B.  thyroid gland
C.  adrenal medulla
D.  adenohypophysis
E.  parathyroid glands

72.  Which gland is formed by an evagination from the floor of the diencephalon?  
A.  anterior pituitary gland
B.  posterior pituitary gland
C.  thyroid gland
D.  adrenal glands
E.  pancreas

73.  Which gland is derived from both neural crest cells and mesoderm?  
A.  anterior pituitary gland
B.  posterior pituitary gland
C.  thyroid gland
D.  adrenal glands
E.  pancreas

74.  Which gland originates as two evaginations from the duodenum?  
A.  anterior pituitary gland
B.  posterior pituitary gland
C.  thyroid gland
D.  adrenal glands
E.  pancreas

75.  Which gland develops from an evagination of the ectoderm in the roof of the embryonic oral cavity?  
A.  anterior pituitary gland
B.  posterior pituitary gland
C.  thyroid gland
D.  adrenal glands
E.  pancreas

76.  The embryonic heart  
A.  develops from two endothelial tubes that fuse together.
B.  consists of four chambers.
C.  has two atria but only one ventricle.
D.  doesn’t beat until just prior to birth.
E.  has no passages connecting right side to left side.

77.  The opening that connects the right and left atria in the fetal heart is the  
A.  interatrial septum.
B.  septum primum.
C.  septum secundum.
D.  foramen ovale.
E.  foramen rotundum.

78.  Which of the following statements concerning the embryonic circulatory system is true?  
A.  The heart develops from four endothelial tubes.
B.  Blood vessels form from blood islands.
C.  An opening in the interatrial septum is called the sinus venosus.
D.  The bulbus cordis becomes the sinoatrial node (the adult pacemaker).
E.  There is an opening in the interventricular septum.

79.  The lungs develop from  
A.  somitomeres.
B.  neural crest cells.
C.  an evagination from the foregut.
D.  an evagination from the floor of the diencephalon.
E.  an invagination from the hindgut.

80.  The adult kidney develops from the  
A.  pronephros.
B.  metanephros.
C.  mesonephros.
D.  allantois.
E.  neonephros.