Muscle, Skeletal, And Skin Systems Flashcards
What protects the skin from burning?
Melanin
Skin forms a _______________that keeps disease causing microorganisms and harmful substances outside the body.
Barrier
Which part of the skin contains the nerves and blood vessels?
Dermis
Washing your face gets rid of dirt
and harmful bacteria such as…
Acne
List the five major functions of the skeleton.
Provides shape and support. Enables you to move. Protects your organs. Produces blood cells. Stores minerals and other materials.
The 26 small bones that make up the backbone are the ______________.
Vertebrae.
The long bones of the arms and legs make ____________.
Blood.
Circle the letter of bones that are held together but immovable joints. A. Knee B. Ankle C. Skull D. Wrist
C. Skull
What kind of Motion does the hinge joint have?
Allows forward and backward motion.
Where is the hinge joint found in your body?
Found in the knee and elbow.
What kind of motion does the ball and socket joint have?
Allows a free swinging motion.
Where is the ball and socket joint found in your body?
Found in your shoulders and hips.
What kind of motion does the pivot joint have?
Allows one bone to rotate around another.
Where is the pivot joint found in your body?
Found in your neck.
What kind of motion does the gliding joint have?
Allows one bone to slide over another.
Where is the gliding joint found in your body?
Found in your ankles and wrists.
Where is the compact bone found?
Beneath the outer membrane.
What is marrow?
Soft connective tissue in the spaces in bone.
Much of an infants skeleton is..?
Cartilage
Why is exercise important for muscles?
It helps maintain strength and flexibility.
Is skeletal muscle striated it or not?
Striated
Is smooth muscle striated or not?
Not
Is cardiac muscle striated or not?
Striated
Where is cardiac muscle found?
Only in the heart.
A strong connective tissue that attaches muscles to bone is a __________.
Tendon
Why must skeletal muscles work in pairs to move a bone?
Muscle cells can only contract, not extend.
To bend the elbow, the biceps muscle ____________ and the triceps muscle returns to its ______________________.
Contract
Original length
List the levels of organization in the human body in order from smallest to largest.
Cells, tissues, organs, organ systems.
The control center that directs the cells activities and contains information that determines the cells form and function is the ____________.
Nucleus
Muscle tissue can ____________ and _____________.
Contract
Shorten
Tissues perform _______ complex jobs organs.
Less
The ________________ layer of skin is the epidermis.
Outermost
To bend a joint one muscle ____________ while the other muscle returns to its regular length.
Contracts
Organ system contain ______, organs, and tissues.
Cells
What is the function of the nervous system?
Carries messages to and from the brain to other parts of the body.
What is an organ system?
A group of organs that work together to perform a major function.
The process by which an organism’s internal environment is get stable and spite of changes in the external environment is called _____________.
Homeostasis
How does your body maintain a constant temperature on a hot day?
Allows access heat to escape the body by sweating.
Describe the levels of organization.
…..
What are three bones and what organ they protect.
…..
