the stage in the human life cycle in which both males and females usually go through puberty.
tiny filtering unit of the kidney
Ability to resist a certain infection or toxin though antibodies or specialized white blood cells
preparation made from killed bacteria or damaged particles from bacterial cell walls or viruses that can prevent some bacterial and viral diseases
an organ in the human or animal body that secretes particular chemical substances for use in the body
Permanent end of menstruation and fertility.
in humans, chemical produced by the endocrine system, released directly into the bloodstream by ductless glands; affects specific target tissues, and can speed up or slow down cellular activities
complex group of defenses that protects the body against pathogens—includes the skin and respiratory, digestive, and circulatory systems.
Right and left sides of an organism can be divided into approximate mirror images of each other across a midline.
A cell resulting from the fusion of two gametes.
a cell that bears receptors for a hormone, drug, or other signaling molecule
tube that carries urine from the bladder to the outside of the body
Mature male or female cells that are able to unite with the other of the opposite sex in sexual reproduction to form a zygote.
bean-shaped urinary system organ that is made up of about 1 million nephrons and filters blood, producing urine
fingerlike projections covering the wall of the small intestine that increase the surface area for food absorption
Where an embryo implants and a baby develops.
relating to the process of excretion or getting rid of waste