By Lauralee Sherwood

Stay alongside of brand new speedy advances within the organic sciences with ANIMAL body structure: FROM GENES TO ORGANISMS 2E with CourseMate! With assurance of animal species that might be correct for your animal-related profession, this biology textual content provide you with the instruments you want to be triumphant. bins came upon through the textual content corresponding to Molecular Biology and Genomics, past the fundamentals, demanding situations and Controversies, Unanswered Questions, and a more in-depth examine edition provide you with examples of state-of-the-art learn and assist you see how what you're studying applies to the true global. money Your knowing questions after each one significant part assist you evaluate the most rules as you learn. each one bankruptcy then ends with a bankruptcy precis, a suite of assessment, Synthesize, and learn questions, and an inventory of urged Readings for extra research.

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These organs collectively break down food into small nutrient molecules that can be absorbed into the blood. We end this chapter with a closer look at these systems. The total animal body—a single, independently living individual—consists of the various organ systems structurally and functionally linked together as an entity that is separate from the external (outside organisms) environment. Thus, an animal is made up of living cells organized into life-sustaining systems. 3 Describe the basic functions of life.

We examine this development in Chapters 9 and 11. However, if there is something that each cell or organism needs to retain, such as heat, the larger object is at a 10-fold advantage because heat is typically produced by the volume of the cell and lost through its surface area. In Chapter 15 we examine this aspect of physiology in detail. Scaling also affects skeletal mechanics. The ability of a skeleton (or a tree trunk, for that matter) to support mass against gravity increases with the cross-sectional area of the skeletal element (such as a leg bone or insect limb exoskeleton).

For example, modern electronic thermostats have anticipator circuits that shut off the furnace just before the set point is actually reached, so that the hot air already on its way from the furnace to the thermostat brings the room to the set point without overshooting. As an organismal example, temperature sensors in a mammal’s skin detect external heat or cold, and can trigger corrective responses before the internal “core” temperature is disturbed. Similarly, when a meal is still in the digestive tract, a feedforward mechanism increases secretion of a hormone (insulin) that promotes cellular uptake and storage of ingested nutrients after they have been absorbed from the digestive tract.

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