Nervous System Physiology
For instance, if biliary drainage is impaired than that part of the liver will end up wasting away. There was an error submitting your subscription. Certain foods and drinks may be triggers for people with an overactive bladder also called urinary urge incontinence. The systems of the body includes the circulatory, immune, skeletal, excretory, muscular, endocrine, digestive, nervous and respiratory. The stomach is a muscular sac that is located on the left side of the abdominal cavity, just inferior to the diaphragm. There was an error submitting your subscription. The female reproductive system contains two main parts:
Keep Exploring Britannica
Myelin coats and insulates the axon except for periodic breaks called nodes of Ranvier , increasing transmission speed along the axon. The cell body soma contains the neuron's nucleus with DNA and typical nuclear organelles. Dendrites branch from the cell body and receive messages. A typical neuron has about 1, to 10, synapses that is, it communicates with 1,, other neurons, muscle cells, glands, etc. They all carry electro-chemical nerve signals, but differ in structure the number of processes, or axons, emanating from the cell body and are found in different parts of the body.
Sensory neurons or Bipolar neurons carry messages from the body's sense receptors eyes, ears, etc. These neurons have two processes. Sensory neuron account for 0.
Examples are retinal cells, olfactory epithelium cells. Motoneurons or Multipolar neurons carry signals from the CNS to the muscles and glands. These neurons have many processes originating from the cell body. Examples are spinal motor neurons, pyramidal neurons, Purkinje cells. These have two axons instead of an axon and a dendrite. One axon communicates with the spinal cord; one with either the skin or muscle.
Examples are dorsal root ganglia cells. Fortunately, there are about billion neurons in the brain. Glial cells are nerve cells that don't carry nerve impulses. The various glial meaning "glue" cells perform many important functions, including: Neuroglia meaning "nerve glue" are the another type of brain cell. These cells guide neurons during fetal development. Respiration works at external as well as internal level and, at cellular stage, is further divided into aerobic and anaerobic types.
Various organs combine together to form the respiratory system which in turn helps organisms Major organs of this system are grouped into two broad categories which are respiratory tract and lungs. However, it cannot perform its functions without the assistance of pulmonary blood circulation and oxygen binding You can survive without food and even water for many hours but life becomes impossible when you are unable to breathe even for a few minutes!
Primary function of respiratory mechanism is to supply each body cell with desired amount Dozens of diseases of human respiratory system have been afflicting mankind throughout the globe which are caused mainly by microbes, like bacteria, viruses, and other disease causing agents. Many of such disorders have either very One of the most important systems in the bodies of males and females is the one which supports the function of breathing. The structure of the respiratory system consists of several vital components which enable humans to