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Biology Body Systems
Biology Body Systems
148
Biology
9th Grade
05/10/2012

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Term
Connective Tissue
Definition
Hold your body together.
Term
Muscle Tissue
Definition
Interact with hairs on the skin to respond to stimuli.
Term
Nervous Tissue
Definition
Detect external stimuli (pain or pressure)
Term
Epidermis
Definition
Outer layer of skin.
Term
Keratin
Definition
Protects living cell layers
Term
Melanin
Definition
Pigment that colors the skin and protects body cells from damage by solar radiation.
Term
Dermis
Definition
Inner or 2nd layer of skin.
(Contains: blood vessels, nerves nerve endings, sweat/oil glands)
Term
Hair follicle
Definition
Hair grows out of these and they are supplied with blood vessels and nerves.
Term
Subcutaneous Layer
Definition
Underlying or 3rd layer of skin: fat and connective tissue that helps the body absorb impact, retain heat and store food.
Term
temperature
Definition
Skin regulates body _________.
Term
protects
Definition
Skin ________ the body.
Term
sense
Definition
Skin functions as a _______ organ.
Term
vitamins
Definition
Skin produces essential _______.
Term
clots
Definition
Stage that skin goes through to heal damaged skin: Blood ______.
Term
scab
Definition
Formation of a ______, which prevents bacteria from entering the body.
Term
White
Definition
________blood cells migrate to the wound.
Term
multiply
Definition
Skin cells begin to ______ and fill in the gap.
Term
First Degree Burn
Definition
Death of epidermal cells
Ex. sunburn
Term
Second Degree Burn
Definition
Damaged epidermis and dermis
Blisters and scarring.
Term
Third Degree Burn
Definition
Destroys epidermis and dermis
(skin function is lost and may need skin graft)
Term
oil
Definition
As one ages, the skin becomes drier as glands decrease ____ production and the skin wrinkles due to decreasing elasticity.
Term
Axial Skeleton
Definition
Skull and bones that support it.
(vertebrate column, ribs and sternum)
Term
Appendicular Skeleton
Definition
Arms and legs
Term
Joints
Definition
Where 2 bones meet.
Term
Ligaments
Definition
Connects bone to bone.
Term
Cartilage
Definition
Cover end of bones for smooth movement.
Term
Bursae
Definition
Fluid filled sacs outside joints (decrease friction/stops bones from rubbing)
Term
Tendons
Definition
Connect bone to muscle.
Term
Ball and Socket Joint
Definition
Allows movement in all directions
(Hip/Shoulder)
Term
Pivot Joints
Definition
Bones can twist around each other.
Term
Hinge Joints
Definition
Back and forth movement
(Knees, elbows, fingers, toes)
Term
Gliding Joints
Definition
Allow bones to slide past each other.
(Wrists and ankles)
Term
Compact tissue
Definition
Layer of hard bone. (outside)
Term
Osteocytes
Definition
Living bone cells.
Term
Spongy tissue
Definition
Layer of less dense bone which contains many holes and spaces.
Term
Supports
Definition
The skeleton system ______ the body.
Term
attachment
Definition
The skeleton system provides a place for muscle __________.
Term
vital
Definition
The skeleton system protects ______organs.
Term
cells
Definition
The skeleton system makes blood ______.
Term
Red marrow
Definition
Produces red blood cells.
Term
Yellow marrow
Definition
Stores fat.
Term
phosphorous
Definition
The skeleton stores calcium and ______.
Term
mandible
Definition
The jaw is called the _______.
Term
pelvic girdle
Definition
The hip is known as the ____ _____.
Term
sacrum
Definition
The large heavy bone of the spine.
Term
coccyx
Definition
The tail bone is known as the _____.
Term
clavicle
Definition
The collar bone is known as the _____.
Term
scapula
Definition
The shoulder blade is called the ______.
Term
sternum
Definition
The breast bone is called the ______.
Term
ribs
Definition
The cage of bones that protect the heart and lungs is known as the ______.
Term
humerus
Definition
The large bone in the upper arm.
Term
radius
Definition
The small bone in the lower arm on the same side of the thumb is known as the _____.
Term
ulna
Definition
The small bone in the lower arm on the same side of the little finger is known as the _______.
Term
carpals
Definition
The wrist bones are known as _____.
Term
metacarpals
Definition
The hand bones are known as ______.
Term
phalanges
Definition
The toes and finger bones are known as _____.
Term
femur
Definition
The largest bone in the body that is known as the thigh.
Term
patella
Definition
The knee cap is known as the ______.
Term
tibia
Definition
The larger bone in the lower leg is known as the ______.
Term
fibula
Definition
The smaller bone in the lower leg is known as the _____.
Term
calcaneous
Definition
The heel bone is known as the ______.
Term
tarsals
Definition
The ankle bones are known as the _______.
Term
metatarsals
Definition
The foot bones are known as the _______.
Term
smooth tissue
Definition
Lines organs and contracts to move materials through the body.
Term
cardiac tissue
Definition
Contracts rhythmically to keep the heart beating.
Term
skeletal tissue
Definition
Attached to bones and contracts to produce body movements.
Term
involuntary muscle
Definition
Not under conscious control
Term
voluntary muscle
Definition
Under conscious control
Term
pairs
Definition
The majority of skeletal muscles work in _______.
Term
fibers
Definition
Muscle tissue consist of muscle ______.
Term
myofibrils
Definition
Muscle tissue consists of muscle fibers, which can be divided into smaller units called _________.
Term
Actin
Definition
Thinner filaments made of protein.
Term
Myosin
Definition
Thicker filaments made of protein.
Term
Sacromeres
Definition
Functional units of muscles are known as ________.
Term
contracts
Definition
A muscle ______ when filaments with in the micro-fibrils slide toward one another.
Term
mouth
Definition
Digestion begins in the ______.
Term
mechanical
Definition
Chewing is _______ digestion.
Term
chemical
Definition
Enzymes changing food on a molecular level is _______ digestion.
Term
esophagus
Definition
The _________ transports food from the mouth to the stomach.
Term
peristalsis
Definition
Involuntary movement of the esophagus that pushes down food.
Term
epiglottis
Definition
The flap of cartilage that closes over the opening to the respiratory tract as you swallow.
Term
stomach
Definition
Chemical and mechanical digestion continue in the acidic environment of the ________.
Term
small
Definition
In the ______intestine, digestion is completed and food is absorbed.
Term
water
Definition
What facilitates chemical reactions in the body, acts as a solvent, and helps maintain internal body temperature?
Term
metabolic rate
Definition
Hormone levels, body mass, age, gender and level of physical activity all affect _________.
Term
nervous
Definition
The endocrine glands work with the ______system to regulate body functions.
Term
hypothalamus
Definition
The part of the brain that connects endocrine and nervous system.
Term
pituitary gland
Definition
Controlled by the hypothalamus and connects to it by nerves and blood vessels.
Term
negative feedback
Definition
Blood hormone levels are controlled by a _______ system.
Term
target
Definition
Steroid hormones bind to receptors inside the _____cells.
Term
plasma membrane
Definition
Amino acid hormones bind to ___________
receptors.
Term
glucose
Definition
Hormones are involved in the regulation of blood _______ and calcium levels, as well as responses to stress.
Term
adrenal gland
Definition
Prepares body for stressful situations.
Term
thyroid gland
Definition
Regulates metabolism, growth, and development.
Term
fight of flight response
Definition
In stressful situations, the adrenal gland can release adrenaline. It changes heart beat, blood pressure, breathing, and muscle contraction.
Term
adrenal
Definition
What gland secretes adrenaline (epinephrine)?
Term
pathogens
Definition
A disease producing agent.
Term
cells
Definition
Symptoms of a disease are caused by direct damage to _______ or by toxins produce by the pathogen.
Term
endemic
Definition
Some diseases occur periodically, whereas others are _________.
Term
innate immunity
Definition
The body's earliest lines of defense against any and all pathogens.
Term
physical
Definition
Innate immunity includes the _________ barrier of the skin as well as mucus.
Term
acquired immunity
Definition
Defending against a specific pathogen by gradually building up a resistance.
Term
antibody
Definition
Acquired immunity includes _________ and cellular immunity.
Term
lymphatic
Definition
The _________ system helps the body defend itself against disease and also helps maintain homeostasis by keeping body fluids at a constant level.
Term
passive
Definition
Immunity that develops as a result of acquiring antibodies generated in another host.
Term
active acquired
Definition
Immunity that develops when the body is directly exposed to antigens and produces antibodies in response.
Term
alveoli
Definition
External respiration involves taking in air through the passageways of the respiratory system and exchanging gasses in the ________ of the lungs.
Term
cilia
Definition
To prevent dirty air from reaching the lungs, nasal cavity, and trachea, the bronchi are lined with ________.
Term
coughing
Definition
Foreign substances are expelled by ______ or sneezing.
Term
O2 and CO2
Definition
The aveoli are sacs of the lungs where ____ & ________ are exchanged by diffusion.
Term
contraction
Definition
Breathing involves _________ of the diaphragm which is the rush of air into the lungs.
Term
relaxation
Definition
Breathing involves the _____________of the diaphragm which is are being pushed out of the lungs.
Term
involuntary
Definition
Breathing is an ____________process and is partially controlled by the chemistry of the blood.
Term
blood
Definition
What is compose of red and white blood cells, platelets, and plasma.
Term
oxygen
Definition
Blood carries ______ and carbon dioxide and other substances through the body.
Term
red blood cells
Definition
Carries O2 to body cells.
Term
white blood cells
Definition
Defends the body against disease.
Term
plasma
Definition
Fluid portion of blood.
Term
platelets
Definition
Cell fragments needed for blood clotting after an injury.
Term
hemoglobin
Definition
Iron containing protein molecule in red blood cells that bind to O2 and carry it from lungs to the body's cells.
Term
antigens
Definition
Blood cell ____________ determine blood group and are important in blood transfusions. They are substances that stimulate an immune response in the body.
Term
antibodies
Definition
Proteins in blood plasma that are shaped to correspond with the different blood surface antigens.
Term
arteries
Definition
Carries blood away from the heart.
Term
veins
Definition
Carries blood back to the heart.
Term
capillaries
Definition
Microscopic blood vessels.
Term
heart
Definition
The main function of the ___________ is to keep blood moving constantly throughout the body.
Term
atrium
Definition
Two upper chambers of the heart.
Term
ventricle
Definition
Two lower chambers of the heart
Term
blood pressure
Definition
Force that the blood exerts on blood vessels.
Term
aorta
Definition
The biggest/strongest part of the heart that pushes blood out to the entire body.
Term
kidneys
Definition
Filters the blood to remove waste and it maintains homeostasis of body fluids.
Term
ureter
Definition
Each kidney is connected to a ___________, which leads to the urinary bladder.
Term
urinary bladder
Definition
A bag that stores waste.
Term
nephrons
Definition
The __________of the kidneys filter wastes from the blood.
Term
wastes
Definition
Blood entering a nephron carries _______ produce by cells.
Term
homeostatsis
Definition
The urinary system helps maintain the ____ of body fluids.
Term
neuron
Definition
The _________is the basic structural unit of the nervous system.
Term
impulses
Definition
_______ move along a neuron in a wave of changing charges.
Term
dendrite
Definition
Receives impulses and carries them toward the cell body.
Term
axon
Definition
Extension of neuron that carries impulses away from cell body and toward other neurons, muscles, or glands.
Term
synapse
Definition
The space between neurons.
Term
sensory neurons
Definition
Carries impulses from the body to the spinal cord and brain.
Term
motor neurons
Definition
Carries response impulses away from brain and spinal cord.
Term
peripheral nervous system
Definition
Relays messages to and from the central nervous system.
Term
cerebellum
Definition
Controls conscious activites, intelligence, memory, language, skeletal muscle movements and senses.
Term
medulla oblongata
Definition
controls involuntary activities (breathing, heart rate)
Term
sight
Definition
The sense of _____ is a response to light stimulation.
Term
mechanical
Definition
The senses of hearing, balance, and touch are responses to ________ stimulation.
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