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"2017-03-15 03:58:10"
The Nervous System In 9 Minutes
\\nnst the great and mighty nervous system or the brain is most of this college what makes this organ unique is that within it lies the ability for humans to know oneself this feature distinguishes and sets the human species apart from the rest of creation this ability is known as consciousness or intelligence to begin let's look at the primary function of the nervous system the basic purpose is to coordinate all of the activities of the body it enables the body to respond and adapt to changes that occur both inside and outside the body now the nervous system is actually split into 2 parts the central nervous system and the peripheral nervous system we'll explore the peripheral later but first let's look at the central nervous system the central nervous system is made up of 2 major structures the brain and the spinal cord as most people know the brain is found within the cranium her skull and their 6 main sections among other structures within it the 6 sections are the cerebrum cerebellum diencephalon the mid brain puns and then the doula oblongata the first section is the cerebrum this is the largest section it's divided into 2 major hemispheres which are the right and left him a severe and the cerebrum is further divided into 4 lobes these 4 lobes are the frontal the parietal the temporal and the occipital the frontal lobe is primarily responsible for reasoning and thought the parietal is primarily responsible for integrating sensory information the temporal is primarily responsible for processing auditory information from the ears and the occipital is primarily responsible for processing visual information from the ice the second section of the brain is the cerebellum this is the section located in the back of the head below the cerebrum and above the first cervical of the neck it is responsible for muscle coordination ballots posture and muscle tone the diencephalon section is found between the cerebrum in the mid brain it contains 2 structures Alamos and the hypothalamus that thou misbehaves and much like a relay station and direct sensory impulses to the cerebrum and the hypothalamus controls and regulates atomic nervous system functions such as temperature appetite water balance sleep and blood vessel construction and dilation the hypothalamus also plays a role in the emotions such as anger here pleasure pain and affection the mid brain section is located below the cerebrum at the top of the brain stem it is responsible for certain I an auditory reflexes puns is located below the mid brain and in the brainstem it is responsible for certain reflex action such as chewing tasting and saliva production and the last section is the McDougal oblongata it's the lowest part of the brain stem and it connects with the spinal cord and is responsible for regulating heart and blood vessel function digestion restoration swallowing coughing sneezing and blood pressure it's also known as the center for respiration now that we've covered the brain let's take a look at the other half of the central nervous system the spinal cord the spinal cord is the link between the brain and the nerves and the rest of the body spinal cord is divided into 4 different regions the cervical Jurassic lumbar and the a fair and into efferent spinal nerves which merged to form the peripheral nerves the a ferret spinal nerves are responsible for carrying information from the body to the brain and the effort spinal nerves are responsible for carrying information from the brain to the body now within this elaborate system of nerves and neurons in dendrites there is a system that regulates the functions of the central nervous system what's a lie outside its major components such as the brain and the spinal cord this system is known as the peripheral nervous system it is subdivided into 2 smaller systems the somatic system and the autonomy nervous system the somatic nervous system is responsible for carrying motor and sensory information both to and from the central nervous system this system is made up of nerves that connect to the skin sensory organs and all skeletal muscles somatic system is also responsible for nearly all voluntary muscle movements as well as for processing sensory information that arrives via external stimuli including hearing touch and sight the structures that allow this communication to happen between the nerves throughout the body in the central nervous system I notice the afferent sensory neurons in the effort motor neurons not after it simply means conducting inward and efferent means conducting out word so just like in the spinal nerves the afferent neurons take information from the nerves to the central nervous system and the effort neuron's take information from the central nervous system to the muscle fibers throughout the body the autonomy nervous system is further divided into the sympathetic nervous system and the parasympathetic nervous system the sympathetic nervous system is vital to our survival have you ever heard of the fight or flight response to danger the sympathetic nervous system revs up the body when confronted with imminent danger to either defend yourself or to escape the threat the parasympathetic nervous system is a counterbalance to the sympathetic response to danger whether real or imagined once the threat is gone the parasympathetic brings all the systems of the body back to normal now at this point you should have a basic understanding of the nervous system but let's do a quick recap the basic purpose of the nervous system is to coordinate all the activities of the body it enables the body to respond and adapt to changes that occur both inside and outside the body the 2 major parts of the nervous system are the central nervous system and the peripheral nervous system the central nervous system is also divided into 2 major structures the brain and the spinal cord the brain is found within the skull or cranium and is made up of 6 main sections these 6 sections are the cerebrum cerebellum diencephalon the mid brain ponds and the my doula oblongata the other half of the central nervous system is the spinal cord in the spinal cord is the link between the brain and the nerves and the rest of your body the spinal cord is divided into 4 different regions cervical thoracic lumbar and afferent and efferent spinal nerves which merged to form the peripheral nerves now that we know the brain and spinal cord primarily make up the central nervous system let's look at the peripheral nervous system the peripheral nervous system is essentially the nervous system outside of the brain and spinal cord the peripheral nervous system is then subdivided into 2 smaller systems called the somatic nervous system and the autonomy never system so as you can see the nervous system is quite complex and this is just the tip of the iceberg thanks for watching look for more videos on the nervous system at CT skills.com n't we //
"2015-08-17 18:50:29"
Cardiovascular System In Under 10 Minutes
\\the cardiovascular system also called the circulatory system it's a transportation system of the body the major structures that make this possible are the heart blood vessels and blood simply put the heart pumps the blood in order to move nutrients to the blood vessels to nourish and remove the metabolic waste from the body the purpose of this video is to present a basic understanding of the cardiovascular system a more in depth study of the system will be presented and other CT videos or we will look into each specific part and function of the system the heart has 2 major circuits within the circulatory pathway which work together in a closed circulatory system these 2 pathways are the pulmonary pathway and the systemic pathway and the human organism the right side of the heart pushes the blood to the pulmonary circuit so that it can be oxygenated in the lungs the left side of the heart pumps oxygenated blood to the entire body the blood is then returned to the heart via the systemic pathway where the cycle begins again through the pulmonary pathway it can be said that the heart is actually 2 pops divided by a septum or wall as mentioned in the muscular system video the heart is a involuntary muscle that work somewhat independently from the nervousness this will be explained in more detail later but for now let's take a look at what makes up the heart the heart is a muscular organ with 4 hollow chambers it consists of 2 atria which of the upper chambers and 2 ventricles what are the lower chambers the left and right sides of the heart are divided by the septum the heart is also made up of 3 layers of tissue the innermost layer is the endocardial which is that then smooth membrane that lines the inside of the chambers of the heart informs the surface of the valves of which there for next is the myocardium which is the middle layer it's the muscular wall of the heart or the heart muscle and third the pericardium this is a tough double layered fibrous sac which covers the heart the word vessel has many meanings but in anatomy and physiology blood vessels are meant for carrying blood throughout the body the blood vessels are similar to a 2 way highway system one lane or direction is known as the arteries and the other is called the veins starting in the heart the blood flows to the body through arterial blood vessels the largest of these arteries is known as the aorta these arteries provide the pathway for blood to travel to the body from the heart arteries are then further divided into arterials and arterial capillary arterials are smaller blood vessels that branch out from larger arteries and lead to the arterial capillaries what are the smallest blood vessels in the body the arterial capillaries are connected to the venous capillaries the arterial side of the capillaries is dropping off oxygen and nutrients to the body cells the Venus side of the capillaries picking up metabolic waste from the body cells together they form a network were arteries and veins connect completing the closed circulatory circuit the blood flow from the venous capillaries will flow back from the body to the heart through the venous blood vessels similar to the arteries only in reverse the blood flows from the venous capillaries into a system of veins called the venues these Vignoles connect the larger veins which carry the blood back from the body to the heart via the largest pains known as the superior and inferior vena cava now that we have an understanding of how the blood moves throughout the body we can discuss what it actually is blood is a fluid or liquid known as plasma plasma is made up of 90 percent water and this is why drinking a sufficient amount of healthy water is absolutely necessary blood contains many substances but the 3 main substances we will discuss in this video are the 3 different types of blood cells each having its own particular function the first type of blood cell is called erythrocytes these are known as the red blood cells leukocytes are known as the white blood cells and Toronto sites are the platelets now the hard work alone in that it has its own electrical system designed to work on its own independent from the nervous system give the nervous system is damaged I cannot send signals to the skeletal muscles or to other major organs such as the brain a heart will not be affected because it has its own chemical slash electrical system that will continue to pump the blood throughout the body people with brain damage are placed on life support for brief not for pumping or contracting the heart the only thing that would stop this mechanism is the lack of oxygen and or blockage or direct injury to the heart the conduct of pathway within the heart has 4 main stations there which it sends its electrical impulses in order for the heart to keep beating which is roughly 100000 times a day the first conducted pathway is the S. a node the S. a note known as the pacemaker it's located in the right atria it starts the spark and passes it on to the next relay station the AV node is located on the back wall of the heart between the right atrium and the right ventricle the spark is then passed on to the next relay station the bundle of his located in the heart septum and lastly to the project he fibers which spread the electrical charge throughout the myocardium which is the cardiac muscle and causes the heart to contract Atreus first and then the ventricles after watching this video you should now have a basic understanding of what the cardiovascular system is the basic functions and the basic structures that define the heart here's a quick recap cardiovascular or circulatory system is an organ system whose basic purpose circulate blood to and from cells in the body in order to transport nutrients and remove waste the heart pumps the blood to the body through the arteries which branch off into smaller blood vessels called arterial the network of capillaries is where oxygen and other nutrients diffuse from the blood and into the cells as oxygen and nutrients are diffused into the cells from the arterial capillaries metabolic waste is diffused into the venous capillaries from the cells the blood returns to the heart via the veins where the cycle begins again and remember that the heart has a beat of its own through the electrochemical circuit system and it's for relay stations someone all up no heart pumps blood to the body through the arteries and returns from the body to the heart through the veins unfortunately the heart is also subject to disease and conditions in fact the number one reason for an early demise is still due to heart failure these conditions will be discussed further in future C. T. E. videos thanks for watching and look for more CD videos where we will explore deeper into the cardiovascular system I'm nnsl //



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