Tissues, Organs, and Systems of Living Things

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Presentation transcript:

Tissues, Organs, and Systems of Living Things UNIT 1 Tissues, Organs, and Systems of Living Things Chapter 1: Cells and More Cells Chapter 2: Plants: From Cells to Systems Chapter 3: Animals: From Cells to Systems

Animals: From Cells to Systems CHAPTER 3 Animals: From Cells to Systems In this chapter you will investigate how: the cells in animals become specialized unspecialized cells replace and repair damaged tissues organs coordinate the actions of tissues and work together in systems medical technologies and health strategies affect public health Copyright © 2010 McGraw-Hill Ryerson Ltd.

Skin: More Than a Covering (Page 83) Skin, our body’s largest organ, is composed of a variety of specialized tissues and cells. oil gland Copyright © 2010 McGraw-Hill Ryerson Ltd.

3.1 Cells and Tissues (Page 85) Most of the 75-100 trillion cells that make up the human body are specialized to do certain tasks. The three main factors that influence the differentiation of these cells are: the contents of the cell’s cytoplasm environmental conditions, such as temperature the influence of neighbouring cells Copyright © 2010 McGraw-Hill Ryerson Ltd.

Cell Specialization: Cytoplasm Content (Page 85) Differences between the cells in an amoeba and cells in a blue whale are related to differences in cytoplasm content. Copyright © 2010 McGraw-Hill Ryerson Ltd.

Cell Specialization: Environmental Conditions (Page 86) On the cat pictured below, dark- and light-coloured hair developed when skin cells experienced warm or cool temperatures during cell differentiation. Copyright © 2010 McGraw-Hill Ryerson Ltd.

Cell Specialization: Neighbouring Cells (Page 86) In this chick embryo, neighbouring cells influence the development of the eye in a specific location. Copyright © 2010 McGraw-Hill Ryerson Ltd.

Cell Specialization: Abnormal Cell Development (Page 87) The production of abnormal cells is often linked to: environmental conditions, such as the presence of chemical contaminants, temperature changes, diseases, and parasites, that are present during cell development. Similar cell conditions form similar cells. Copyright © 2010 McGraw-Hill Ryerson Ltd.

Types of Tissues (Page 88) Tissue: a cluster of similar cells that share the same specialized structure and function. There are only four main types of tissue: epithelial, muscle, nervous, and connective. Epithelial Tissue Copyright © 2010 McGraw-Hill Ryerson Ltd.

Types of Tissues Muscle Tissue (Page 88) Copyright © 2010 McGraw-Hill Ryerson Ltd.

Types of Tissues Nervous Tissue (Page 89) Copyright © 2010 McGraw-Hill Ryerson Ltd.

Types of Tissues Connective Tissue (Page 89) Copyright © 2010 McGraw-Hill Ryerson Ltd.

Types of Tissues (Pages 88-89) Click the “Start” button to review the tissues in the human body. Copyright © 2010 McGraw-Hill Ryerson Ltd.

Stem Cells (Page 90) Stem Cell: an unspecialized cell that can produce various specialized cells Copyright © 2010 McGraw-Hill Ryerson Ltd.

Uses of Stem Cells (Page 91) Embryonic stem cells are unspecialized cells that can become any one of an organism’s body cells, making them valuable for research and medical treatment. Copyright © 2010 McGraw-Hill Ryerson Ltd.

Concepts to be reviewed: Section 3.1 Review (Page 92) Concepts to be reviewed: the factors affecting cell specialization (cytoplasm contents, environmental factors, and neighbouring cell secretions) the four types of tissues (muscle, epithelial, nervous, and connective) the potential and ethical concerns over the production or harvesting of stem cells Copyright © 2010 McGraw-Hill Ryerson Ltd.