SACCONE IS THE COOLEST Chapter 10 Excretion

SACCONE IS THE COOLEST Excretion The process by which cellular wastes are removed from the organism

SACCONE IS THE COOLEST Types of Metabolic Wastes 1. Carbon dioxide and water -from cellular respiration 2. Nitrogenous wastes -produced from the breakdown of amino acids Ex: a) ammonia – most toxic b) urea – less toxic c) uric acid – non toxic

SACCONE IS THE COOLEST Notes of Interest All of these wastes are poisons at high concentrations Urine- is a liquid waste composed of water, urea, and salt Don’t confuse excretion with egestion - egestion (defecation)- is the removal of feces from the digestive tract

SACCONE IS THE COOLEST Adaptations for Excretion

SACCONE IS THE COOLEST Protista Excretion is accomplished by diffusion through the cell membrane Major waste products are ammonia and CO 2 Contractile vacuole- is used to remove excess water from the organism

SACCONE IS THE COOLEST Protista Excretion is accomplished by diffusion through the cell membrane Major waste products are ammonia and CO 2 Contractile vacuole- is used to remove excess water from the organism

SACCONE IS THE COOLEST Plants Excess gases diffuse out of the plant through stomates of the leaves, the lenticels of the stems, and the root hairs of the roots Major waste in plants is oxygen

SACCONE IS THE COOLEST Hydra Like protozoa, excretion of wastes is by diffusion The major wastes are ammonia and CO 2

SACCONE IS THE COOLEST Hydra Like protozoa, excretion of wastes is by diffusion The major wastes are ammonia and CO 2