smooth muscle		stores urine
neuron		pumps oxygen-rich blood to the body
peripheral nervous system		a group of organs that work together; ex. nervous sys.
veins		a large muscle that contracts to allow you to inhale
organ system		heart muscle
skin		a quick, automatic response to a stimulus; ex. blinking
cardiac muscle		chemical formula for energy
respiratory system		relays messages, processes information, and "thinks"
alveoli		proteins that recognize and bind to antigens
right atrium		eliminates liquid waste from the body
fertilization		a group of cells that perform a single function; ex. blood
tissue		anything that triggers an immune response; ex. viruse, bacteria or other pathogen
valves		exchanges gases for the body: takes in oxygen and release carbon dioxide
neurotransmitters		controls growth and development using hormones
ovary		the smallest blood vessels
skeletal system		found only in the heart
muscular system		produces testosterone; makes the sperm
bladder		helps protect the body from disease
myocardium		breaksdown food; absorbs nutrients; eliminates solid waste
pancreas		transports oxygen, nutrients, and hormones to cells; removes waste
T cells		produces insulin to regulate blood sugar levels
central nervous system		prevent blood from flowing back into the atria; ex. mitral
circulatory system		supports the body, protects internal organs, allows for movement
large intestine		guard against infection, fight parasites, attack bacteria
immune system		makes red blood cells and some white blood cells
arteries		tiny air sacs
white blood cells		produces estrogen and progesterone; makes the egg
skeletal muscle		propels food from the mouth to the stomach
ATP		oxygen-poor blood from the upper and lower parts of the body enters the heart here
left atrium		most chemical digestion and absorption of nutrients occurs here
endocrine system		the largest organ in the human body; part of the integumentary system
red blood cells		cells that transmit impulses/messages for the nervous sys.
antibodies		a barrier against bacteria; protects against ultraviolet radiation
right ventricle		removes water from undigested food
excretory system		not under your control; moves food through the digestive tract
cancer		the basic unit of living things
red bone marrow		works with skeletal system to produce movement; helps circulate blood
reflex		carry oxygen-poor blood
left ventricle		oxygen-rich blood enters the heart here
cell		body defense against abnormal cells and pathogens; destroyed by HIV
antigen		pumps oxygen-poor blood to the lungs
small intestine		disease; an uncontrollable growth of cells
testis		consists of all the nerves that are not part of the brain or spinal cord
esophagus		a group of different tissues that work together; ex the eye
digestive system		attached to bone; responsible for voluntary movement
kidney		contain hemoglobin that binds to oxygen
integumentary system		carry oxygen-rich blood
capillaries		filters waste from the blood
trachea		the process of sperm joining an egg
organ		windpipe
diaphragm		chemicals used to transmit messsages between neurons