The endocrine gland is the ductless gland which produce hormones through diffusion and are transported by the bloodstream.
exocrine gland are transmitted through duct or tube. example is the salivary gland
I can’t see it try zooming in
Answer:
1 ). Earthworms have what are called closed circulatory systems. Closed circulatory systems are those in which the blood is kept in a closed system of vessels, like in humans. Open circulatory systems are when the blood is pumped into a body cavity called a hemocoel, allowing the blood to surround the organs.
2). Crayfish also have an open circulatory system. Blood flows into the heart through dorsal ostia, and is pumped into body sinuses through arteries at both the posterior and anterior ends of the ventricle.
Explanation:
hope it will help you
This seems like a hard question to the naked eyes,but before I answer does it say you need 2 feet in the newspaper? Do you have to put all of your foot on it? Is one sheet of paper only needed?