A gland is an organ capable of synthesizing a substance that will then be secreted. The endocrine glands secrete hormones, which will be released into the bloodstream with a role in communication between cells. This is, for example, the pituitary gland, the thyroid, the adrenal glands. The exocrine glands, such as the salivary or lacrimal glands, but also the mammary, sebaceous or sweat glands, produce substances that will be released into body cavities, or outside these cavities.
The correct answer is option C. Endocrine glands secrete hormones into the bloodstream because endocrine glands are ductless and the exocrine glands have ducts so they secrete their hormones into the ducts.
Prokaryotic cells have a cell wall surrounding their cell membrane .The Prokaryotic cells don't have a well defined nucleus .The genetic material of the cell is basically naked and not enveloped by the Nuclear membrane .
Eukaryotic cells don't have a cell wall surrounding their cell membrane. The Eukaryotic cells have a well organised nucleus .The genetic material of the cell is surrounded by nuclear membrane or nuclear envelope.
Both Eukaryotic and prokaryotic cells have DNA.Both have a plasma membrane or cell membrane.
