Answer:
The correct answer is: Release their secretions directly into the blood.
Explanation:
Glands are organs that <u>regulate bodily functions by producing and releasing certain substances</u>. Endocrine glands are a type of gland that specifically releases its product into the bloodstream.
Endocrine glands' products are called hormones and they travel through the blood vessels in order to reach their destination (the organ where they are supposed to act),
An example of an endocrine gland is the pancreas. The pancreas produces insulin and glucagon, two different hormones that act in different organs to regulate glucose levels.
The answer is The law of ''gravity'' helps explain why the density of air as the altitude above earth's surface increases.
Many rickettsia are PATHOGENS.
Pathogens are micro organism that cause diseases and rickettsia are majorly disease causing organisms. They are rod shaped bacteria and most species are gram negative. They are natural parasite of some arthropods and they cause diseases in both humans and animals.
I think the correct answer among the choices listed above is option C. The correct order of organizations of structures in living things from simplest to most complex should be c<span>ells as the most basic unit of life, Tissues, Organs and Organ Systems. Hope this answers the question.</span>
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