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Transcript of Body System
The appendix sits at the
junction of the small intestine
and large intestine.
It’s a thin tube about four inches long.
Located in the lower
Acts as a storehouse for good bacteria
“rebooting” the digestive system
after diarrhea illnesses
Their function is to filter
out all the dead bacteria,
viruses, and other dead
tissue from the lymphatic
fluid and eliminate it.
500-700 lymph nodes total
The spleen has two main functions: to filter the blood and to coordinate the immune response.
The spleen is made up of two different tissues, the red and white pulps
Located in little clumps inside the red pulp
Its purpose is to mature immune cells and blood cells
Provides protection from foreign
invaders in several ways.
There are specialized cells of the immune system throughout the layers of the skin.
Some of these cells detect invasion by foreign proteins, such as bacteria and viruses.
Other cells have the
function of destroying
and removing such
Responsible for many functions, including the production of T Lymphocytes – a type of white blood cell responsible for cell mediated immunity rather than antibody controlled immunity
Form resistance to infection by mold-like bacteria, yeasts, fungi, parasites and viruses
Protect us from the development
of cancer and allergies.
Trap bacteria and viruses (germs) which you may breathe in.
The body is constantly under attack from things that are trying to do it harm.
These include toxins, bacteria, fungi, parasites and viruses. All of these can,
cause damage and destruction to parts of the body and
would not be able to function. It is
the purpose of the immune system to protect the body.
Your respiratory system is made up of the organs in your body that help you to breathe.
The goal of breathing is to deliver oxygen to the body and to take away carbon dioxide.
The alveoli are the final branching of the respiratory tree
and act as the primary gas exchange units of the lung.
The gas-blood barrier between the alveolar space and the pulmonary capillaries is extremely thin,
allowing for rapid gas exchange.
Large, delicate tubes that carry air into the tiny branches and smaller cells of the lungs
connect the trachea to the two lungs
air sacs that
function as the
for the two
Located in the throat behind the tongue and in front of the larynx
Allow air to pass into the larynx and lungs
When a person swallows
the epiglottis folds backward
to cover the entrance of the
larynx so food and liquid do
not enter the windpipe
functions as an airway to the lungs as well as providing us with a way of communicating
functions are all possible because of the skeletal components and the muscles that act on them
The lungs are a pair of spongy, air-filled organs
The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi.
Covered by a thin tissue layer called the pleura.
A thin layer of fluid acts as a lubricant allowing the lungs to slip
smoothly as they expand and contract with each breath.
Nasal cavity is the air passage behind the nose
The tissue that covers the wall of your nasal cavity contains many blood vessels.
Moisture is added to the air you breath by special cells in the walls of the nasal cavity.
The air is warmed and
moistened before it reaches your lungs.
Can be divided into three regions
depending on the position
The three regions are nasopharynx (behind the nasal cavities)
the oropharynx (behind the buccal cavity) and the laryngopharynx (behind the larynx).
The pharynx is a common passageway for air and food
The pharynx opens into two pathways, one that leads to the esophagus or food passage and the other trachea or air passage.
about 4 inches long
The trachea is composed of about 20 rings of tough cartilage.
Moist, smooth tissue called mucosa lines the inside of the trachea.
The trachea widens and lengthens slightly with each breath in, returning to its resting size with each breath out.
The nervous system is an organ system containing a network of specialized cells called neurons that coordinate the actions of an animal and transmit signals between different parts of its body.
The brain is one of the largest and most complex organs in the human body.
The cortex is the outermost layer of brain cells. Thinking and voluntary movements begin in the cortex.
The brain stem is between the spinal cord and the rest of the brain. Basic functions like breathing and sleep are controlled here.
The basal ganglia are a cluster of structures in the center of the brain. The basal ganglia coordinate messages between multiple other brain areas.
The cerebellum is at the base and the back of the brain. The cerebellum is responsible for coordination and balance.
-Located underneath the limbic
system is the brain stem.
Its responsible for basic vital life functions such as breathing, heartbeat, and blood pressure.
The brain stem is made of the midbrain, pons, and medulla.
The outer ear is called the pinna and is made of ridged cartilage covered by skin
Sound funnels through the pinna into the external auditory canal, a short tube that ends at the eardrum
Sound causes the eardrum and its tiny attached bones in the middle portion of the ear to vibrate, and the vibrations are conducted to the nearby cochlea.
The spiral-shaped cochlea it transforms sound into nerve impulses that travel to the brain.
They send information on balance and head position to the brain.
Just behind the iris and pupil lies the lens, which helps to focus light on the back of the eye
The inside lining of the eye is covered by special light-sensing cells that are collectively called the retina
The retina converts light into electrical impulses, optic nerve carries these impulses to the brain.
Macula is a small sensitive area within
the retina that gives central vision.
Eye color is created by the amount and type of pigment in the iris (also genes inherited from each parent)
One or more bundles of fibers forming part of a system that conveys impulses of sensation/motion.
Between the brain or spinal cord
and other parts of the body.
A set of specialized cells of the mucous membranes of the nose, which are receptors of smell.
From the brain the spinal cord descends down the middle of the back and is surrounded and protected by the bony vertebral column.
The spinal cord is surrounded by a clear fluid called Cerebral Spinal Fluid, it acts as a cushion to protect the delicate nerve tissues against damage from banging against the inside of the vertebrae.
We have several thousand taste buds
Taste buds are actually tiny nerve endings that allow us to perceive different tastes.
Including: Salt, sweet, sour,
Immune, Nervous & Respiratory System
By: Gwen B. 3rd
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