Skin, muscular, and skeletal system quiz

Describe the dermis

Inner lay of skin between epidermis and fat T hick Contains sweat glands, hairs and oil glands Perspiration leaves skin through pores and strands of hair grow in follicles

Myofibrils are make of even smaller protein filaments called...

Myosin(thick) and actin (thin)

What is an involuntary muscle?

Muscle you cannot control

Immovable joints

Allows little or no movement

What is a muscle?

An organ that can relax and contract, providing the force to move your body

Joints

Any place where two or more bones come together; held in place by tough bandof tissue - ligament

What is skeletal muscle?

Attached to the bones of the skeleton; have tendons, or strong connective tissue attaching muscle to the bone; classify as voluntary

Hinge joints

Back-and-forth movement

What is bones structure?

Bones are alive, therefore they grow and develop

Why is Calcium important in the human diet?

Calcium is important for overall health. Almost every cell in our body uses calcium in some way. Some areas where our bodies use calcium is in our nervous system, muscles, heart and bone. Our bones store calcium in addition to providing support for our bodies. YOU DO NOT HAVE TO MEMORIZE THE WHOLE THING JUST THE BASICS

Muscle cells can only ____________________, not extend.

Contract

What is muscle tissue made of ?

Fibers or fused muscle cells

What is smooth muscle?

Found in internal organs; involuntary muscles that react more slowly and tire more slowly

What is the cardiac muscle?

Found only in the heart; involuntary muscle that does not get tired; contract repeatedly - contractions are your heart beats

Spongey bone

Found towards end of long bones; with many small spaces within it

What are the 5 major functions of the skeleton?

Gives shape Protects internal organs Major muscles are attached to your bones Blood cells are formed in red marrow at center of bones Calcium and phosphorus compounds are stored for later use by body

Compact bone

Hard, strong layer under periosteum

Define skin

Largest organ of the body that covers and protects the body from injury, infection and water loss

What is A skeleton?

Made up of all the bones in your body;has five major functions

What is the voluntary muscle?

Muscles you are able to control

Each fiber is made up of smaller units called __________________

Myofibrils

Pivot joint

One bone rotates around another

Gliding joint

One part of bone slides over another

Describe eliminating wastes

Perspiration also contains dissolved wastes from the breakdown of proteins

Skin is able to ______________________________ and ____________________________ when injured.

Produce new cells and repair itself

What are the 3 functions of skin?

Protecting the body, Maintaining temperature, eliminating wastes

Marrow

Soft, connective tissue found within spaces; two types: red and yellow - red produces blood cells, yellow stores fat as energy reserve

Ball and socket

Rounded end of one bone fits into a cup like structure of another

Cartilage

Rubbery layer of tissue found at the ends of bones where they form joints

How does skin recover from it being injured?

Scabs form to protect Skin cells multiply to fill in gap of skin Skin grafts, pieces of skin used from one part of body to repair another in case of severe skin damage

What are the 3 types of muscle tissue?

Skeletal muscle, smooth muscle, and cardiac muscle

Since muscle cells can only contract, not extend, what must work on pairs?

Skeletal muscles

Describe protecting the body

Skin forms a barrier to keep disease causing microorganism and harmful substances out and keeps water in

What are the 2 layers of tissue that make up skin?

The epidermis and dermis.

What does muscle strength depend on?

The muscle cells and tissues

What happens when one muscle contracts?

The other muscle in the pair relaxes to its original length

How does the body cool itself?

The skin is composed of many blood vessels that can expand to allow more blood flow, and skin also contains sweat glands which produce sweat to cool your skin

Describe maintaining temperature

The skin is composed of many blood vessels that can expand to allow more blood flow. Also contains sweat glands.

Describe the epidermis

Thin, outer layer of skin which does NOT contain nerves or blood vessels Outer most cells are dead Cells produce melanin which is a pigment that gives skin color

Periosteum

Tough membrane covering bones surface