Organs and Organ Systems
An organ is an anatomically structure of the body that composed of two or more types of tissues that work together to do one or more specific physiological functions. Examples of human organs include the brain, heart, lungs or skin. Human organs are organized into organ systems. They are a group of organs that work together to carry out a complex overall function.
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an introduction to the human body
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systems hello this is mrs. Sanchez by
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the end of this homework video you will
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be able to demonstrate understanding
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that there are different systems within
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the body and that they work
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independently and together to form a
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functioning human body you will also be
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able to show understanding of
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homeostasis we have already studied that
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cells make up body tissues tissues make
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up organs and organs are part of an
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organ system for example the circulatory
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respiratory and so on it is important to
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remember that organ systems do not work
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in isolation they work together as part
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of a big team here is an introduction to
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the major organ systems the circulatory
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system is the body's transport system
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delivering materials through the body
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including blood gases and wastes a
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network of tubes called blood vessels
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are connected to the heart that pumps
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the blood through this network of blood
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vessels the heart is the hardest working
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muscle in the body pumping nearly two
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gallons of blood daily the digestive
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system provides a way to break down food
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and absorb nutrients that our body needs
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to grow move and maintain homeostasis or
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balance the digestive system is made up
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of a series of tube like organs
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converting our meals into body fuel
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there's about 30 feet of these pipeworks
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starting with the mouth and ending in
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the anus the endocrine system consists
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of glands that release chemicals known
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as hormones into the bloodstream
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hormones regulate many body functions
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such as metabolism growth and
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reproduction the immune system is a
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network of cells tissues and organs that
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work together to protect the body from
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infection its main function is to
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prevent or limit infection here we have
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a phagocyte encircling and in funding
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bacteria the integra montery system
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consists of skin hair nails glands and
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nerves its main function is to act as a
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barrier to protect the body from the
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outside world it also functions to
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retain body fluids protect against
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disease eliminate waste products and
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regulate body temperature skin is the
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body's largest organ and it's the first
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line of defense the lymphatic system
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is a network of tissues and organs that
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primarily consists of lymph vessels
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lymph nodes and limp its primary
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function is to transport lymph a clear
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colorless fluid containing white blood
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cells that helps rid the body of toxins
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waste and other unwanted materials lymph
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nodes are an important component of the
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body's immune system and help in
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fighting infection the muscular system
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is made of muscle tissues in the body
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working together enabling us to move
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pump blood digest food and lift heavy
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things there are three different types
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of muscle tissue skeletal muscle which
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is attached to bones smooth muscle
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including involuntary muscles like in
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the digestive organs arteries and veins
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stomach and intestines and cardiac which
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is the heart muscle the nervous system
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is the part of the body that monitors in
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response to changes in the environment
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this complex system is responsible for
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functions as basic as controlling your
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heartbeat and telling us it's time to
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eat or time to go to the bathroom the
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brain and spinal cord make up the
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central nervous system pairs of nerves
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outside of the central nervous system
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are known as the peripheral nervous
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system at the cellular level we have
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neurons the respiratory system involves
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the lungs is responsible for the
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exchange of gases essential for the body
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and all its cells the most important of
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which is the exchange of oxygen and
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carbon dioxide that happens with each
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breath and the lungs we breathe in the
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air around us and we exhale carbon
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dioxide the urinary system removes waste
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from the blood just like a filter would
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remove waste from an aquarium the
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urinary system also removes excess water
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and salts the kidneys do most of this
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work the skeletal system provides shape
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and support for the body without it we
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would be a shapeless mass of cells the
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skeletal system is made of 206 bones
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cartilage and ligaments it also produces
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bone marrow from inside the bone the
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reproductive system is a collection of
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organs that work together for the
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purpose of producing a new life
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homeostasis we know that the various
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body systems work hand-in-hand
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bus in healthy balance homeostasis is
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defined as the body's regulation of
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steady life maintaining conditions body
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temperature example a good example of
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system regulation of your body can be
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found in the regulation of body
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temperatures you are a homeo a
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endothermic organism which means you
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regulate your own body temperature other
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species like reptiles are not homeo
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endothermic anyway if your body gets too
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cold a series of actions are taken to
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warm your body sensors throughout your
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nervous system can recognize when the
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temperature drops and might trigger your
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muscular system to start shivering the
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constant contractions of your muscles
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allow heat to be generated your nervous
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and endocrine systems may also contract
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the blood vessels of your circulatory
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system to keep blood in the core of your
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body and not the extremities like your
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fingers organ systems working together
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the various organ systems work together
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to maintain homeostasis an example is
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how the skeletal and respiratory systems
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work together during breathing when the
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skeletal muscles and the diaphragm
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contract enlarging the chest cavity air
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is drawn into your lungs this makes it
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possible for gas exchange to occur the
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respiratory systems primary function so
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let's try this take a deep breath
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observe your chest movement what did you
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notice if your ribs were broken how
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would this affect your breathing to
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provide oxygen to remove carbon dioxide
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for your body both the respiratory and
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your muscular system are working
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together why do we need to know this you
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are all asking me this why I
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understanding the body systems is
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necessary so we can figure out that to
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do what to do when things go wrong more
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amazing is how all your body systems
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work together to keep you healthy and
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allow you to do what you do can you
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think of other ways organ systems work
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together I know you can so now please
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think about what we just talked about
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and answer all of your questions and
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submit your homework good night made
