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.
B
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The ________ releases oxytocin.
A. anterior pituitary gland B. posterior pituitary gland C. adrenal gland D. hypothalamus
Match the term with the appropriate description.A. A bulge (a weak spot) in the artery wallB. Degenerative changes in arteriesC. An overstretching of the veins of the lower extremitiesD. Inflammation of the veinsE. Small vessels that supply nutrients to large arteriesVaricose veins
Fill in the blank(s) with the appropriate word(s).
The rupturing of the follicle is referred to as __________.
A) Graafian termination B) endometriosis C) oogenesis D) menstruation E) ovulation
Observing the parts of the brain is a part of the study of
A. physiology. B. anatomy. C. homeostasis. D. anthropology.