Nervous, Integumentary and Immune Systems

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Nervous, Integumentary and Immune Systems Finz 2014

Nervous System: Function:- The electrical system of the body. - Control/coordinate body functions and respond to external stimuli Neurons:- Cells that carry electrical signals throughout the body. Three Types: Sensory carry signal from sense organs to spinal cord/brain. 2) Motor carry signal from brain/spinal cord to muscles and glands. 3) Interneurons connect sensory and motor neurons.

Central Nervous System (CNS): Brain has three parts to it. 1) Cerebrum receives sensory impulses and coordinates muscle response and thinking impulses. 2) Cerebellum coordinates voluntary muscle movements and balance. 3) Brain Stem controls involuntary functions, such as breathing, swallowing, blood pressure, etc. Spinal Cord links the brain with parts of the body and controls reflexes.

Peripheral Nervous System (PNS): All other nerves except the brain & spinal cord. Sensory division transmits signals from sensory organs to CNS. Motor division transmits signals from CNS to muscles or glands.

Integumentary System: Function: protection and temperature regulation of the body. Structure: skin has layers called epidermis and dermis. Melanin gives color. Sweat glands cool body. Oil glands condition and waterproof skin. Hair and nails are also a part of this system.

What causes Hair Shape?

ACNE!!

Immune System: contains lymph fluid that travels through vessels and nodes to filter and remove harmful materials from your body. Some White blood cells are made in the lymph nodes. Most WBC’s are made in the bone marrow of the skeletal system.

The Immune System protects your body from invaders

The Heavy Hitters in the Immune System

When a invader enters the body:

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