Define the five systems. be sure to include enough information to distinguish each system from the others. (site 1)

By definition, a body system is primarily comprised of different organs and tissues that work one another to achieve a common body process. These body systems would include:

Circulatory system - concerns with the circulation of blood
Digestive system - breaking down of food particles 
Skeletal system - composed of bone structures serving as our body's framework
Nervous system - composed of nerve cells that responds to different stimuli
Respiratory system - concerns of utilising the entry of oxygen and the exhalation of carbon dioxide.

The human body is a complex system, which is composed of different systems. These systems work in coordination with one another to carry out the vital functions of the body.

The five systems of the body are:

Circulatory System Digestive System Skeletal System Nervous System Respiratory System

The five systems are defined as:

Circulatory systems are associated with the circulation of blood via arteries and veins. The circulatory system also delivers oxygen and nutrients to different parts of the body. The digestive system is associated with digestion, absorption, assimilation, and excretion. The system is complex and made up of organs and glands. The nervous system is defined as the complex network of nerve fibers, which play a crucial role in relaying messages from the brain to different parts of the body. Skeletal System is the framework of bones, which provide support and structural organization to the body. It also helps in the protection of the internal organs of the body. The respiratory system is the network of organs and tissues, which helps in the process of breathing and respiration.

Therefore, the five systems of the body are nervous, skeletal, respiratory, digestive, and circulatory.

To know more about the system of the body, refer to the following link:

link

The answer would be b. it is a learned trait