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The Human Body
Transcript of The Human Body
System is primarily responsible for
movement of the Human body.
*There are 3 main types of Muscles
: majority of muscle mass is responsible for body movement and support. Most of these muscles are Voluntary
: muscles found inside organs that
are used to move substances through other systems. You have no control over these muscles
: Muscles found only in the heart and are responsible for pumping blood through the body.
Muscles of the Arm
Muscles of the Legs
Muscles of the Torso
Skeletal System: is made of bones
and joints which acts as a scaffold
for support of the body and also
protects soft organs of the core
Bones of the Arms
Bones of the Leg
Bones of the Torso
7 Cervical - Neck
12 Thoracic - Chest
5 Lumbar - Lower Back
*There are over 600 muscles in the human body.
*The strongest muscles in the body are the Masseters. These are the muscles used to chew
*Muscles can only pull, they cannot push
*A smile takes 17 muscles, a frown takes 43.
*There are about 206 bones in the Adult Skeleton
*Blood is made in the Marrow of Bones. The Femur produces the most blood by volume
*The smallest bones in the body are the Malleus, Incus and the Stapes - all found in the Inner Ear
*The Hyoid Bone is the only bone that does not form a joint with another bone - it is a floating bone that provides a connection for your tongue
The Digestive System uses specialized organs to breakdown and absorb food.
The Digestive system consists of
Tongue Small Intestine
Esophagus Large Intestine
Stomach Gall Bladder
Teeth crush food
Tongue moves food in mouth
Uvula is the dangly thing
at the back of the Mouth.
It is thought to be used in speech.
forces bolus into
The stomach churns bolus ( a small bite of chewed food that has been swallowed) into a liquid for easy digestion
Liver and Pancreas
The Liver has over 500 functions.
Here are 5:
1. Produces Bile which breaks down food in the SI
2. Converts Glucose into glycogen.
3. Processes Urea into Urine
4. Cleans blood of poisons and drugs
5. Processes Iron from blood
The Pancreas is also a part of the digestion process
1. It assists in the breakdown of proteins, carbs and fats.
2. Produces Insulin, which controls blood sugar levels
3. Neutralizes stomach acids as it moves from the stomach to the SI
Small Intestine is primarily responsible for the digestion process. 90% of the digestion of foods occurs in the S.I. as well as 80% of the absorption of water happens in the S.I. The small intestine is a 20 foot long coiled tube in an Adult
The Large Intestine is a 3" tube about
6 feet long that absorbs the remainder of water from the processed foods and packages the indigestible foods for removal.
The Heart is the pump which moves life giving blood throughout the body. It receives deoxygenated blood from the body, sends it to the lungs for a gas exchange then pumps rich oxygenated blood into the body.
The Aorta is the large Artery coming from the heart to deliver the rich oxygenated blood to the body
The lungs are two sac-like organs with 5 lobes where Air and Blood mix to exchange Carbon Dioxide and Oxygen
The Superior (on top) and Inferior (on bottom) Vena Cava are the primary means of getting deoxygenated blood back to the heart and ultimately to the lungs.
carry rich oxygenated blood
from the heart to the body
carry poor deoxygenated blood
the heart from the body
are microscopic vessels that channel each red blood cell to the tissue.
The Respiratory System contains the
Lungs and Diaphragm
provide a means of inhaling and exhaling.
is the soft tissue which creates the "Throat".
is the "Voice Box" or "Adam's Apple". The vocal cords are located here.
is the "wind pipe" connecting the Lungs to the Mouth and Nose
The Lungs are the source of gas exchange
See Circulatory system for more details
The average person at rest breathes about 12 - 20 times per minute.
Yawning is a sign that your body wants more oxygen.
Breathing is both voluntary and involuntary.
The Excretory System job is to remove solid and liquid waste from the body. It uses several organs to perform this function
The Liver and the Kidneys are the primary filters for the Excretory system, filtering toxins, poisons and waste from the blood
The Ureter connects the Kidney to the Bladder
The Urinary Bladder holds the fluid waste known as Urine
The Urethra is the exit tube by which the Urine leaves the body.
The average adult should urinate 4 to 7 times a day and normally urinates about 2-3 quarts per day.
Urine has a yellow color due to the Uric Acid created by the breakdown of Bile in the digestive system.
The Nervous system controls all function and systems of the Human body. It consists of the
The Brain is the control center. It is responsible for the senses: Taste, Touch, Sight, Balance, Smell and Hearing
Spinal Cord and Nerves are the conduit by which messages are sent to and from the brain and body.
The Spinal cord runs down the length of the back through the vertebral column and nerves take the messages from the cord to the tissue.
*The Brain is about 75% water.
*The Brain weighs about 3 pounds.
*The Brain cannot feel pain.
*The average person dreams 4-7 dreams per night
The longest nose on a living person is 3.46 in
Every day the average person loses 60-100 strands of hair.
Blondes have more hair.
The human heart creates enough pressure to squirt blood 30 feet.
The acid in your stomach is strong enough to dissolve razorblades.
The human body is estimated to have 60,000 miles of blood vessels.
You get a new stomach lining every three to four days.
The surface area of a human lung is equal to a tennis court.
A full bladder is roughly the size of a soft ball.
Feet have 500,000 sweat glands and can produce more than a pint of sweat a day.
During your lifetime, you will produce enough saliva to fill two swimming pools.
The average person expels flatulence 14 times each day.
The tooth is the only part of the human body that can’t repair itself.
Three hundred million cells die in the human body every minute.
Your body has enough iron in it to make a nail 3 inches long.
The Human Body
Note: not all organs or systems are included in this presentation. Only the systems and organs relevant to 7th grade Science.
There are 12 ribs in both males
and females attached to Thoracic
vertebrae that enclose the chest.
10 are attached to the Sternum in the
front of the body and backbone, while
two are "floating" - only attached to the
The Gallbladder stores bile created by the Liver. Bile acts like a detergent to break down fats. During a meal, the gallbladder squeezes the bile into the Small Intestine.
The Circulatory system moves Blood through the body supplying oxygen to organs. Included are
Superior Vena Cava Inferior Vena Cava
4 chambers of the heart
Right Atrium - takes poor blood from body
Right Ventricle - Pumps poor blood to the lungs
Left Atrium - Takes rich blood from lungs
Left Ventricle - Pumps rich blood to the body
At the microscopic level in the Lung are tiny air sacs called Aveoli. At the Aveoli is the exchange between Air and Blood
The Brain is divided into 3 regions:
the Cerebellum and
the Medulla (Brain Stem)
The Cerebellum is responsible for:
Fine Movement Coordination
Balance and Equilibrium
The Cerebrum is involved in several functions of the body including:
Determining Intelligence and Personality
Producing and Understanding Language
Interpretation of Sensory Impulses
Planning and Organization
The medulla controls:
Control of Autonomic Functions
Relay of Nerve Signals Between the Brain and Spinal Cord
Coordination of Body Movements
The spleen is an organ in the upper far left part of the abdomen, to the left of the stomach. It is commonly fist-shaped, purple, and about 4 inches long.
It acts as a filter for blood. Old red blood cells are recycled in the spleen.
The spleen is a very important organ in the Immune system as well.
The heart beats around 3 billion times in the average person's life.
It takes about 20 seconds for a red blood cell to circle the whole body.
A healthy heart pumps approximately 2,000 gallons of blood a day.
The heart is approximately the size of your fist.
The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respiratory system does this through breathing.
The diaphragm contracts and relaxes during inhalation and exhalation so as to accommodate and expel air from the body.
The lungs right side has 3 lobes
and the left side has 2 lobes
Pelvis has 3 regions: the Ilium, Ischium and Sacrum
The sacrum attaches to the last lumbar vertebrae
When you tighten your
Quads, your leg straightens
This muscle contracts and you