In order to defend our body, macrophages release chemicals that are toxic to eliminate diseases and harmful foreign bodies. They also secrete growth factors that are essential in healing wounds.
IL-1 IL-12 IL-6 and TNF -a
B Cells
glands secrete chemical messengers called leucocytes?
The salivary glands in the mouth secrete enzymes in saliva that begin chemical digestion.
cytokines
The Endocrine System secretes chemical messages called hormones.
Endocrine glands secrete chemical messengers called hormones. These chemicals are secreted directly into the bloodstream, where they are carried by the circulatory system to target tissues throughout the body.
Macrophages do not replicate. The bone marrow produces Monocytes which when they find a damaged area transform into Macrophages.
Exocrine glands
macrophages are very good at the process of phagocytosis
There's a lot we don't currently know about lymphoid (ED3) Macrophages but it's relatively safe to assume that they do not have any major role in secreting antibodies. Macrophages tend to engulf and enzymatically destroy foreign objects in the body, this is their major purpose, if that object is coated in antibodies they're better at destroying it but they do not produce those antibodies themselves. The only real way that macrophages affect antibody production is that after destruction of intruder they'll present elements of the intruder to another variety of immune cell which will then go on to produce antibodies, it's also possible that they will produce interleukins or other compounds to upregulate antibody production but again: macrophages are not known to produce antibodies.
No, macrophages are responsible for removing dying or dead cells in the early stages of inflammation. Macrophages essentially ingest these.