Unit II: Tissues and Integumentary System
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1 Unit II: Tissues and Integumentary System
2 2.1 - Tissues Chapter 4
3 Written Response #1 1. What is a tissue? 2. What are four major types of tissues?
4 Tissue Definition: a group or mass of similar cells working together to perform common functions.
5 Tissue Concept Map Poster - Activity
6 Epithelial Tissue Covers all body surfaces both inside and out. Main glandular (glands) tissue. Attached to underlying connective tissue at the basement membrane Usually has no vascular tissue - blood supply Cells reproduce rapidly, results in rapid healing Cells tightly packed together.
7 Epithelial Tissue Written Response 2: If a girl weighs 100 pounds. How much of her weight is skin?
8 Written Response 3: Where does all the dead skin you shed go? It takes about 27 days for the outer layer of skin to shed and be replaced; that works out to 1.5 pounds of skin cells per year.
9 Skin Cell gun used to replace skin cells of burn victims.
10 Epithelial tissue simple = single layer stratified = multiple layers squamous = flat cuboidal = square columnar = column (rectangle) Naming is based on description One type of tissue can be arranged in different forms, each form has a different function. How might the shape determine the function?
11 Written Response #4 1. List the general characteristics of epithelial tissues. 2. Describe the structure of each type of epithelium 3. Describe the special functions of each type of epithelium.
12 Simple Squamous Form: flat and thin Function: diffusion and filtration; air sacs in lungs, walls of capillaries
13 Simple Cuboidal Function: Secretion and absorption Found in kidneys tubules, ducts and covering the ovaries
14 Simple Columnar Function: Secretion and absorption Found in digestive tract and uterus Contains goblet cells to secrete mucus Can have microvilli
15 Stratified Squamous Multi layer squamous, functions in protection Found in skin and mouth
16 Stratified cuboidal epithelium Consists of two or three layers. Function: Provides more protection than single layers Found: larger ducts of the mammary glands, sweat glands, salivary glands, pancreas, and parts of the reproductive systems.
17 Tissues often come in layers on the body - superficial cuts on the skin may need to be stitched if they also go through the underlying tissue. This will definitely need stitches!
18 Pseudostratified Columnar Single layer, nuclei are uneven which gives it a layered appearance Can have goblet cells and cilia Location: lining air passages and tubes of the reproductive system Function: Secretion and cilia-aided movement
19 Transitional Epithelium Stretchable Blocks diffusion (no leaking) Found in the urinary bladder
20 Urinary Bladder
21 Written Response #5 1. Distinguish between exocrine glands and endocrine glands. 2. Explain how exocrine glands are classified. 3. Distinguish between a serous cell and a mucous cell.
22 Glandular Epithelium Cells are specialized to produce and secrete substances They make up the GLANDS exocrine glands endocrine glands salivary, sweat hormones
23 Written Response #6: Identify the Tissues
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27 Virtual Lab Histology / Metabolic Disorders Research
28 Written Response #7 1. What are the general characteristics of connective tissues? 2. What are the characteristics of collagen and elastin? 3. How are loose connective tissue and adipose tissue related? 4. Explain the difference between loose connective tissue and dense connective tissue.
29 Types of Tissues - Handout Complete types of tissues reference tables.
30 Connective Tissue Most abundant tissue in your body, found throughout Binds structures together Provides support, protection, framework, fills space, stores fat, produces blood cells, fights infection Composed of more scattered cells within matrix Made up of a ground substance and fibers Most have a good blood supply Cells can reproduce
31 Types of Cells in Connective Tissue Mast cells (prevents clots/allergic responses) Macrophages (consumers) Fibroblasts (produce fibers) Main types of fibers: Collagenous = bones, ligaments, tendons Elastic = ears, vocal cords
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33 The Matrix Basement membrane Ground substance
34 Categories of Connective Tissue
35 Loose Connective Tissue or Areolar Tissue Binds underlying organs to skin and to each other Forms delicate thin membranes throughout the body
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37 Adipose Tissue (Fat) Energy storage
38 Fibrous Connective Tissue Tendons connect muscles to bones Ligaments connect bones to bones
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40 Cartilage Cartilage cells are called chondrocytes Cartilage is a type of DENSE CONNECTIVE TISSUE
41 Hyaline Cartilage Location: covers ends of joints, nose and respiratory passages, serves as padding
42 Hyaline cartilage
43 Elastic cartilage Location: External Ear and Larynx
44 Fibrocartilage Tough, shock absorbing Location: Between vertebrae
45 Bone Tissue (Osseus) Osteocytes Cell of bone tissue. Most rigid connective tissue due to calcium phosphate and calcium carbonate between cells. Function: Supports body structures. Protects vital organs. Attachment point for muscles. Rich in blood supply.
46 Blood Tissue Transports a variety of materials between interior body cells and those that exchange substances with the external environment. Components of blood plasma: Red Blood Cells White Blood Cells Platelets Forms in the red marrow within the hollow parts of certain long bones.
47 Written Response #8 1. List the general characteristics of muscle tissues. 2. Distinguish among skeletal, smooth, and cardiac muscle tissues.
48 Muscle Tissue
49 Cardiac muscle Found only in the heart. Muscle fibers are branched and connected in complex networks. Involuntary muscle controlled without thought.
50 Skeletal muscle Long, threadlike cells with light and dark crossmarkings, striations, that has many nuclei located just beneath the cell membrane. Found in muscles that attach to bones. Voluntary Can be controlled with thought. These cells move by contraction and shortening of the muscles.
51 Smooth muscle Cells lack striations and are shorter than skeletal muscles with a centrally located nucleus. Found in the walls of hollow internal organs, intestines, urinary bladder, uterus, and blood vessels. Involuntary muscle
52 Vocabulary: Scaffolding Decellularization Matrix Collagen Antigens Graft Written Response 9: Watch the video and define the terms above. Written Response 10: What is the purpose of this technology?
53 Written Response #9 1. Describe the general characteristics of nervous tissues. 2. Distinguish between neurons and neuroglial cells.
54 Nerve Tissue Found in the brain, spinal cord, and peripheral nerves. Help to coordinate, regulate, and integrate many body functions.
55 Nervous tissue (spinal cord)
56 Lab: Tissue Identification Observe the different types of tissues under the microscope and make note of what they look like. We will test on these items.
57 Quiz: Tissue Identification
Tissues Chapter 5...Tissue - a group or mass of similar cells working together to perform certain common functions
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Epithelial Tissue. Simple Cuboidal Function: secretion and absorption. Simple Squamous
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