what you will do today... -discuss how the human body is organized into several levels -recognize...
TRANSCRIPT
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What you will do today . . .
-Discuss how the human body is organized into several levels
-Recognize that the tissue level is the second level, going from smallest to largest
-Name the four types of tissue in the human body.
-Describe the specific functions of each tissue type.
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Are you an organ/tissue donor?
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Human Organization
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Overall SchemeCells
Tissues
Organs
Organ Systems
Organisms
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Types of Tissues
1. Epithelial: covers body surfaces and lines body cavities
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Epithelial Tissue
a. External for protection
b. Internal are specialized for absorption (taking in) or secretion (letting out)
c. Three types of epithelial cells
-Squamous: flattened cells, protection and diffusion
-Cuboidal: cube-shaped, secretion
-Columnar: pillars, absorption
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Squamous Cells
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Cuboidal Cells
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Columnar Cells
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Epithelial Tissue
d. Epithelium can be simple (one layer) or stratified (more than one layer)
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Types of Tissues
2. Connective: binds organs together, provides support and protection, insulates, stores fat, produces blood cells; most widely spread tissue type with most diverse functions
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Connective Tissue
a. Connective tissue cells are found throughout a non-living matrix of elastin and collagen, which are proteins
b. There are five types . . .
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Five Types of Connective Tissue
-Loose connective tissue are made of cells called fibroblasts; this tissue is adipose (fat)
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Five Types of Connective Tissue
-Fibrous connective tissue makes up tendons and ligaments
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Five Types of Connective Tissue
-Cartilage
i. Hyaline
ii. Elastic
iii. Fibrocartilage
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Five Types of Connective Tissue
-Bone
i. Compact
ii. Spongy
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Five Types of Connective Tissue
-Blood
i. Erythrocytes (Red Blood Cells)
ii. Leukocytes (White Blood Cells)
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Types of Tissue
3. Muscle: Composed of cells called muscle fibers
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Types of Muscle Tissue
a. Skeletal muscle is striated and voluntary
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Types of Muscle Tissue
b. Smooth muscle is involuntary
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Types of Muscle Tissue
c. Cardiac muscle is striated but involuntary
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Types of Tissue
D. Nervous: made of conducting cells called neurons
1. Brain
2. Spinal Cord
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What is an organ?
Organ: structure that is composed of two or more types of tissues that work together to perform functions
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What is homeostasis?
Homeostasis: internal environment remains relatively constant; performed by negative feedback