Presentation on theme: "LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert."— Presentation transcript:
How do complex animals exchange resources and waste with their environment? Exchange 0.1 mm 1 mm Exchange Gastrovascular cavity Mouth (b) Two layers of cells(a) Single cell
External environment Food Mouth Animal body Respiratory system CO 2 O2O2 Lung tissue (SEM) Cells Interstitial fluid Excretory system Circulatory system Nutrients Digestive system Heart B l o o d Blood vessels in kidney (SEM) Lining of small intestine (SEM) Anus 100 m Unabsorbed matter (feces) 50 m 250 m Metabolic waste products (nitrogenous waste) Internal exchange surfaces of complex animals
The endocrine system The endocrine system transmits chemical signals called hormones to receptive cells throughout the body via blood –A hormone may affect one or more regions throughout the body –Hormones are relatively slow acting, but can have long-lasting effects
Testing your understanding of the big picture Draw a model of the control circuit(s) required for driving an automobile at a fairly constant speed over a hilly road, or for a human controlling temperature within their body. Indicate each feature that represents a sensor, stimulus, or response.