Regulation and maintenance of the internal environment - temperature, fluids, salts, pH, nutrients, and gases.

A cell that stores information and carries messages within the nervous system and between other body systems.

This organ pumps blood through your body

Viruses, Bacteria, Fungi, and parasites are all examples of this disease causing agents.

Your body is made up of 55 to 60 percent of this

This should remain between 36.7 C and 37.1 C.

The branchlike extensions of a neuron that receive messages from neighboring cells.

Returns oxygen-poor blood to the heart

Destroys pathogens by surrounding and engulfing them

Foods like meat, cheese, eggs, red beans, and rice contain this type of nutrient.

The process of maintaining a steady body temperature under a variety of conditions.

Electrical impulse

Kind of blood found in arteries

The two ways pathogens can enter the body.

These can be classified as saturated or unsaturated.

This system influences growth, development, metabolism; helps maintain homeostasis.

Specialized cells like rods and cones

Cells that pick up oxygen in the lungs and delivers it to all the body's cells.

Insects are an example; something that carry a pathogen and transmit it into healthy cells.

This type of fat can cause cell damage and is linked to obesity.

Control system counteracts any change in the body that moves conditions above or below a set point.

The brain and spinal cord

Blood comes to these small branches in the lung to absorb O2.

The type of immunity your body produces in response to a specific pathogen that has infected or is infecting your body.

We use carbohydrates as our main source.