U9 : Undersea world

C R O S S W O R D Let’s warm up S H A R K C R O S S W O R D Let’s warm up O C T O P U S C R O S S W O R D Let’s warm up C O R A L C R O S S W O R D Let’s warm up S E A G U L L C R O S S W O R D Let’s warm up D O L P H I N C R O S S W O R D Let’s warm up S E A W E E D M O R E P I C T U R E S Let’s warm up SEA HORSE STAR FISHTURTLECRAB SQUID W H A L E S H A R K WARM-BLOODED AND COLD BLOODED ANIMALS W A R M B L O O D E D A N I M A L S DEFINITION Warm-bloodedness generally refers to three separate aspects of thermoregulation. Endothermic is the ability of some creatures to control their body temperatures through internal means such as muscle shivering, fat burning, drawing and panting. Homoeothermic is thermoregulation that maintains a stable internal body temperature regardless of external influence. This temperature is often higher than the immediate environment. The opposite is poikilothermy. Tachymetabolism is the kind of thermoregulation used by creatures that maintain a high resting metabolism. Tachymetabolic creatures are, essentially, "on" all the time. Though their resting metabolism is still many times slower than their active metabolism, the difference is often not as large as that seen in Brady metabolic creatures. Tachymetabolic creatures have greater difficulty dealing with a scarcity of food. WARM-BLOODED AND COLD BLOODED ANIMALS [...]... energy-intensive, for example: 1 in winter many small birds lose one third of their body weight overnight 2 in general a warm-blooded animal requires 5 to 10 times as much food as a cold-blooded animal of the same size and build, so cold-blooded animals are better at surviving famines and barren environments WARM-BLOODED AND COLD BLOODED ANIMALS W A R M B L O O D E D A N I M A L S Thermographic image: a coldblooded... temperatures:  lizards and snakes bask in the sun in the early morning and late evening, and seek shelter around noon  bees in large hives will cool the hive in hot periods by going to its entrances and using their wings as fans to draw cooling air through the hive  Some other "cold-blooded" creatures use internal mechanisms to maintain body temperatures significantly above the ambient level: Tuna and... it enters into the gills and after it exits from them: Veins are right next to arteries and thus extract heat from the arteries and carry it back into the body  Large sea turtles exhibit inertial homeothermy (Gigantothermy) their low ratio of surface area to volume minimises heat loss Oasis of the Pacific T I M E I S R U N N I N G O U T Members: Luong Toan Hoang Long Phan Ngoc Anh Vu Le Khoa THANKS... approach near-death states, until favourable conditions return WARM-BLOODED AND COLD BLOODED ANIMALS C O L D B L O O D E D A N I M A L S Types of temperature control Examples of temperature control include:  Snakes and lizards sunning themselves on rocks  Fish changing depths in the water column to find a suitable temperature  Desert animals burrowing beneath the sand during the day  Insects that warm... S Ecological niches  It is comparatively easy for a poikilotherm to accumulate enough energy to reproduce Poikilotherms in the same ecological niche often have much shorter lifetimes than homeotherms: weeks rather than years  This energy difference also means that a given niche of a given ecology can support three to ten times the number of poikilothermic animals as homeothermic animals However, . and fat-burning to maintain temperature are very energy-intensive, for example: 1. in winter many small birds lose one third of their body weight overnight COLD BLOODED ANIMALS W A R M B L O O D E D A N I M A L S Thermographic image: a coldblooded snake is eating a warmblooded mouse WARM-BLOODED AND COLD BLOODED