In this sagittal section showing the upper respiratory tract, what structure does number 5 indicate?

Breathing muscles such as the diaphragm are controlled by neurons of the _________ nervous system.

Compared to most interstitial fluid in the body, the interstitial fluid of an inflamed area would have a lower osmolarity and a lower concentration of proteins.

Which class of chemical messenger facilitates white blood cell formation in bone marrow?

Upon activation, a T-lymphocyte

Which type of cell responds to multiple antigens?

The antigen-antibody reaction is an example of the regulation function of blood.

Which type of antigen would have the greatest immunogenicity?

Lymphatic organs

After maturation, T lymphocytes tend to remain in the same lymphatic structure for life.