A) digestive system
B) venous blood
C) arterial blood
D) nerves
Correct Answer: B
Solution :
[b] The endocrine glands are also called ductless glands as they do not have their own ducts (tubes) to carry hormones to target sites. Hormones are carried by the blood as plasma i.e. venous blood reaches heart and then it is distributed throughout the body.
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