Unit 1- Anatomy

Skeletal muscle

Attaches to skeleton, responsible for voluntary movement, has striations.

Smooth muscle

Found in organs, moves substances through body, involuntary, no striations.

Cardiac muscle

Found in the heart, pumps blood, involuntary, has striations

Bones

Make up the skeleton and support the body. Protect internal organs, produce blood cells, store minerals, and are used for movement.

Joint

Place where two bones meet, used for movement

Cartilage

Strong connective tissue that supports the body and is softer and more flexible than bone. Found at the ends of bones and other places like the ears and nose.

Ligament

Connects bone to bone

Tendon

Connects bone to muscle

Brain

Controls all other parts of the body

Spinal cord

Carries information to and from the brain

Sensory neurons

Receive information from the organs and send it to the interneurons in the brain

Interneurons

Make decisions and sends that signal to motor neurons. Found in the spinal cord and brain. They connect the sensory and motor neurons.

Motor neurons

Receive signals from the interneurons and send them to muscles and glands.

Neuron

The basic unit of the nervous system.

Nerve impulse

Electrical signal

Reflex arc

The signal only goes to the spinal cord, not the brain.

Nose

Inhales and exhales. Moistens air and filters dust and particles from the inhaled air.

Pharynx

Tube that connects the mouth with the lungs and digestive tract. Passageway for both air and food.

Larynx

Passageway for air in the respiratory system

Trachea

Passageway for air, connects the larynx to the bronchi

Bronchi

Branches of the trachea that lead to each lung.

Lungs

Organs where gas exchange takes place.

Bronchiole

Branches of the bronchi.

Alveoli

Tiny air sacs in lungs surrounded by capillaries. This is where the gas exchange (oxygen and carbon dioxide) happens.

Heart

Pumps blood.

Arteries

Carry blood AWAY from the heart.

Veins

Carry blood TO the heart.

Capillaries

Tiny blood vessels where the exchange of gases, nutrients, wastes occurs.

Red blood cells

Pick up oxygen in the lungs and bring it to all the cells in the body

Liver

Removes toxic compounds from the blood (circulatory), makes bile (digestive)

Kidneys

Control amount of water in blood, creates urine, filters toxins

Platelets

Clot blood (Coagulate)

Plasma

Transports other blood cells and antibodies.

White blood cells

Fight diseases by secreting antibodies.

Mouth

Teeth and tongue break big food pieces into smaller ones. Starch digestion begins with enzyme amylase in saliva. Chemical and mechanical digestion

Esophagus

Tube that connects the mouth to the stomach. Performs peristalsis.

Stomach

Contains acids and enzymes, mechanically and chemically breaks down food.

Small Intestine

Absorbs nutrients from the digested food.

Gall Bladder

Stores bile.

Pancreas

Produces digestive enzymes which work in the small intestine.

Homeostasis

Maintaining a steady internal environment while the external environment changed

Large Intestine

absorbs water

Hormone

Chemical messenger that helps maintain homeostasis