The Nervous System

The nervous system coordinates its actions and sensory information to and from different parts of the body. 

Planes, Anatomical Directions, and Body Cavities

Planes and Anatomical Directions

Frontal View

Frontal nervous system view

Sagittal View

Sagittal Brain View

Transverse View

Transverse spinal cord view

Cavities

Cranial Cavity

Organ: Brain

Brain
Thoracic Cavity

Organ: Intercoastal nerve

Intercoastal nerve

Abdominal Cavity

Organ: Subcoastal nerve

Subcoastal nerve

Tissues

Temperature

The nervous system responds to a drop in body temperature by making blood vessels constrict and triggering muscles to shiver.

Constricted Blood Vessel

The normal body temperature of the human body is 98.6 degrees fahrenheit.

How the hypothalamus responds changes in body temperature.

The Nervous system responds to a raise in body temperature by dilating blood vessels and triggering sweat glands.

Dilated Blood vessel

pH

The nervous system responds to a drop in pH with ASIC3 cells.

ASIC3 Cell

The nervous system responds to a rise in pH with PKD2L1 cells.

PKD2L1 Cell

Blood Pressure

The nervous system responds to a drop in blood pressure by increasing the heart rate and constricting blood vessels.

Constricted Blood vessel
The average blood pressure of the human body is about 120 over 80.
Blood pressure chart

The nervous system responds to a rise in blood pressure by reducing the heart rate and dilating the blood vessels.

Heart rate

Blood Sugar

The nervous system responds to a drop in blood sugar by telling the body to pump out adrenaline.

Adrenaline

The nervous system responds to a rise in blood sugar by signaling the pancreas to produce more insulin.

Insulin