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Which one of these statements about endocrine and exocrine glands is correct?

A{'text': 'Both types always release into a duct system'}
B{'text': 'Exocrine release into blood, endocrine release through ducts'}
C{'text': 'Both types never release secretions outside the gland'}
D{'text': 'Endocrine release into blood, exocrine release through ducts'}
Answer & Solution
Correct answer: D. {'text': 'Endocrine release into blood, exocrine release through ducts'}
1. Endocrine glands are **ductless** and pour hormones into the bloodstream. 2. Exocrine glands carry their secretions through **ducts** to a surface or organ (sweat, salivary, gastric). 3. So the correct statement is: endocrine → blood, exocrine → ducts. 4. The other options reverse or misstate this contrast. _Source: Selina Concise ICSE Class 8 Biology Ch 5 "Endocrine System and Adolescence", Key definitions_
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