Hormones are secreted by ductless glands, hence they enter directly into the blood stream which carries it to the targeted organ.
The pituitary gland is endocrine and so all the hormones it produces enter the blood stream. They do this via the circle of willis which is a ring of vessels that's surrounds the gland. As endocrine hormones they travel throughout the body.
How long does it take Dilaudid to get into the blood stream.
You drink it
dosent
their color
Drugs can enter the blood stream by a number of ways: Swallowing Smoking Snorted Injected Suppositried (inserted through he anus, as a capsule,etc)
Oxygen enters the blood stream through the air sacs in you lungs.
The chemical messengers that enter the blood are hormones, and they are carried throughout the body by the circulatory system, specifically the blood vessels. This activity is known as endocrine signaling.
The lungs, I the alviolies.
Caffeine and alcohol enter directly from the stomach.
If it is swallowed, honey takes 20 minutes to enter the blood stream.