Organ Systems Flashcards
What protects the skin from burning
Melanin
How does the skin protect the body
By forming a barrier that keeps disease causing microorganisms and harmful substances outside the body
What contains the nerves and blood vessels of the skin
Dermis
What are the five major functions of the skeleton
Shape and support, movement, protection, production of blood cells, storage
The 26 small bones that make up the backbone or
Vertebrae
The long bones of the arms and legs make
Blood cells
Where is compact bone located
Below the outer membrane
What is Marrow
Soft connective tissue in the spaces in bone
What kind of motion does a hinge joint allow
Forward and backward
Where is cardiac muscle located
Only in your heart
Why must skeletal muscles work in pairs to move a bone
They work together by contracting to being your arms and legs, they can only contract
To bend the elbow, the bicep muscle________And the triceps muscle returns to its_____________
Contracts, original length
The outermost layer of the skin is the
Epidermis
List the levels of organization in the human body, starting with the smallest unit
Cells, tissues, organs, organ system
The control center that direct the cells activities and contains information that determines the cells form and function is the
Nucleus
