glycoproteins
The skin is a protective barrier against infection, other protective mechanisms include bones e.g. the rib cage (protects the heart and lungs) and the skull (protects the brain.) We must also remember that the immune system plays a vital part in keeping viruses and serious infections away from the body.
Those defense mechanisms are designed to protect you from diseases and infections.
it forms a protective layer
The M17 is a protective 'gas' mask. It was first produced in 1959 and used in the Vietnam war to protect troops against any chemical and biological agents present.
to protect themselves against criticism or other harsh treatment.
Adenoids, also known as pharyngeal tonsils, are a ring of protective lymphoid tissue located in the upper portion of the throat behind the nose. They help filter out bacteria and viruses to protect against infections.
The most common vaccines used are Pneumovax or Pnu-Imune 23 (against pneumococcal infections) and Menomune-A/C/Y/W-135 (against meningococcal infections).
The fluid that carries different substances and cells that help regulate body functions and protect the body against disease and infections is called blood.
The related link maybe able to help you.
The root word in "protective" is "protect."
In the lab, you should wear a lab coat, safety goggles, and gloves to protect against chemical spills. Additionally, closed-toe shoes are recommended to prevent any chemical spills from coming into contact with your feet.
The skeleton does not directly protect against infections, as its main function is to support and protect the body's organs and tissues. However, bone marrow within the skeletal system produces immune cells that help fight off infections in the body. Additionally, the strong structure of the skeleton provides a barrier that can help prevent pathogens from entering the body through physical injury.