P-R

measure of acidity

gland of the digestive and endocrine system that produces insulin and pancreatic juices

an endocrine gland in the neck that produces parathyroid hormone

temporary immunity gained by a body that has acquired antibodies from an outside source

an infectious agent

organ for elimination of urine and sperm from the male body

passage of fluid to an organ or a tissue

one of seven horizontal rows in the periodic table

table of elements expressed as columns and rows

thin layer that surrounds bone and is the surface for attachment of tendons and ligaments

series of muscle contractions that move food through the digestive tract

ingestion of particles by cell or phagocytes

physical appearance of a trait formed by genetics and envronment

phosphorous atom bound to 4 oxygen atoms

covalent bond that links 2 nucleotides together in a nucleic acid molecule

small gland near the center of the brain that secretes melatonin

endocrine gland at the base of the brain that controls growth and dvlpmt.

clear pale yellow component of blood that carries red blood cells, white blood cells, and platelets throughout the body

white blood cell that produces a single type of antibody

membrane around lungs and inside chest cavity

substance composed of similar units bonded together

carb polymers made of many sugar molecules

mechanism that stimulates glandular secretion to continue increasing even past homeostasis until a biological effect is reached

in a chem equation, its the right side