human anatomy

the science that deals with the structure of the human body

human physiology

the science that deals with the various processes and activities that take place in the human body

antigen

foreign material in the body that stimulates antibody production or begins cell-mediated immunity

tissue

a group of cells that are specialized to perform a particular function

nervous tissue

tissue made of cells that respond to stimuli and transmit and receive electrical impulses

connective tissue

any of the tissues of the body that connect, support, cushion, and fill spaces around other tissues and organs

matrix

nonliving secretions produced by cells to provide structural and biochemical support

muscle

tissue made of cells that can contract to produce movement

epithelial

a tissue that covers or lines a body part; functions in absorption, secretion, and procreation

Integumentary System

made of skin; protects the body from antigens

Skeletal System

made of a variety of bones; supports and protects the body; allows the body to move

Muscular System

made of muscles; powers the motion of the bones and joints

Digestive System

stomach and intestines; helps the body digest food, absorb nutrients, and eliminate wastes

Lymphatic System

lymph nodes; protects the body from disease-causing antigens; an important part of the body's immune system

Urinary System

eliminates wastes; uses the kidneys and bladder to maintain water balance in the body

Endocrine System

body functions controlled and regulated by hormone-secreting glands in this system (e.g. thyroid)

Circulatory System

involves the heart, which pumps blood through blood vessels to deliver nutrients throughout the body

Respiratory System

involves lungs and all the tubes that bring in outside air; allows the body to breathe, exchanging gases between the blood and air

Nervous System

involves the brain, spinal cord, and a network of nerves; coordinates and controls movement; processes sensory information from the body's environment

Reproductive System

sex organs for reproduction, or procreation