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Introduction to Dissection

Introduction to Dissection. Review of Anatomy/Physiology and Dissection Overview. Standard(s):. BI9. a. Students know how the complementary activity of major body systems provides cells with oxygen and nutrients and removes toxic waste products such as carbon dioxide.

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Introduction to Dissection

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  1. Introduction to Dissection Review of Anatomy/Physiology and Dissection Overview

  2. Standard(s): • BI9. a. Students know how the complementary activity of major body systems provides cells with oxygen and nutrients and removes toxic waste products such as carbon dioxide. • BI9. b. Students know how the nervous system mediates communication between different parts of the body and the body’s interactions with the environment. • BI9. c. Students know how feedback loops in the nervous and endocrine systems regulate conditions in the body. • BI9. d. Students know the functions of the nervous system and the role of neurons in transmitting electrochemical impulses.

  3. Objectives: • Understand the how the human body is organized starting from the smallest (cells) to the largest (organism) level. • Explain how different organ systems work together to maintain homeostasis. • Understand the importance of maintaining a stable internal environment in the human body.

  4. Big Idea # I Physiology :The internal environment of the human body is stable because of multiple organ systems working together. • The human body is made of different levels of organization starting with cells and building up all the way to organ systems. Organ systems work together through mechanisms like negative feedback loops to maintain homeostasis in the human body.

  5. (Review)What are the 5 levels of organization? • Cells-has a particular structure and make up. (epithelial cell) • Tissues-groups of similar cells to perform a specialized function (Epithelial lung tissue cell). • Organs-different types of tissue that function together (lung).

  6. (Review)What are the 5 levels of organization? • Organ systems( respiratory system)-are made of two or more organs. • Organism (you)-Organ systems work together and interact to keep you alive.

  7. (Review)What is homeostasis? • Homeostasis-regulation and maintenance of internal environment of body (temp., gases, pH, fluids, nutrients, and salts). • Negative feedback loops are necessary for homeostasis.

  8. Dissection Overview • Rationale-Rat Anatomy=Human Anatomy • Complete survey of internal and external organs • Observe interactions/connections of organ systems

  9. Rat External Anatomy

  10. Rat Internal Anatomy

  11. Dissection Procedure Overview 1.Rat skinned and muscles exposed. 2. Remove muscles from one hind leg to expose the femur, tibia, and fibula. 3. Pinning the structures of the head and neck. 4. Pinning the organs of the digestive system. 5. Removal and dissection of the kidney, opening of the stomach and small intestines. 6. Pinning the urogenital organs. 7. Turn in the rat.

  12. Dissection Tools • Forceps=tweezers • Scalpel-similar to a knife, used for making incisions, separating tissues • Dissecting scissors-used for making shallow cuts • Dissecting probe-used to carefully move organs • Pins-used to hold back layers/tissues • Dissecting tray-where organism is dissected

  13. Summary Questions: • What are the 5 levels of organization in the human body? • Why is important for your body to maintain homeostatic (stable internal) conditions? • List two dissection tools and their functions. • Why are we dissecting rats? • What is the difference between external and internal anatomy?

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