DO NOW. 10 minutes. Copy the following into your journal on page 5. Open book to page 95. TV/Smart TV/board. Fredericho. Diamond. Shoudeline.
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2 Period 8 TV/Smart TV/board DO NOW Diamond Victoria Winston Fatoumata Kamilla Shoudeline Jassiem Keniya Damarian Fredericho Donald Copy the following into your journal on page 5. Briana Alexandria Jodi Desmond Janaisha Regina Diane Ybel Wasiu Torey Open book to page 95. Christina Jada uyatta A Semaya Marc Tamesha Selena Amanda Jamireus Kimani Malila Adryene Walid Sumer Armoni Trequan Rhema 10 minutes
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6 Terms that help us understand what kinds of tissues we are identifying: Terms referring to the layers Simple = one layer Stratified = more than one layer Pseudostratified = false layered (appears to be more than one layer, but only one); ciliated = with cilia Terms referring to the cell shapes Squamous = flat Cuboidal = cube Columnar = rectangular (column) Transitional = ability to change shape
7 Apical surface Basal surface Simple Apical surface Basal surface Stratified Classification based on number of cell layers.
8 Squamous Cuboidal Columnar Classification based on cell shape.
9 The following types of epithelial tissues are covered in this activity: 1. Simple squamous epithelial tissue (lungs) 2. Simple cuboidal epithelial tissue (kidneys) 3. Simple columnar epithelial tissue (small intestine) 4. Pseudostratified (ciliated) columnar epithelial tissue (trachea lining) 5. Stratified squamous epithelial tissue (mouth lining) 6. Stratified cuboidal epithelial tissue (salivary glands, sweat glands) 7. Stratified columnar epithelial tissue (male reproductive tract) 8 Transitional epithelial tissue (bladder) a. The tissue may show a full bladder b. The tissue may show an empty bladder
10 . (a) Simple squamous epithelium Description: Single layer of flattened cells with disc-shaped central nuclei and sparse cytoplasm; the simplest of the epithelia. Function: Allows passage of materials by diffusion and filtration in sites where protection is not important; secretes lubricating substances in serosae. Location: Kidney glomeruli; air sacs of lungs; lining of heart, blood vessels, and lymphatic vessels; lining of ventral body cavity (serosae). Air sacs of lung tissue Nuclei of squamous epithelial cells Photomicrograph: Simple squamous epithelium forming part of the alveolar (air sac) walls (125x).
11 (b) Simple cuboidal epithelium Description: Single layer of cubelike cells with large, spherical central nuclei. Simple cuboidal epithelial cells Function: Secretion and absorption. Location: Kidney tubules; ducts and secretory portions of small glands; ovary surface. Basement membrane Connective tissue Photomicrograph: Simple cuboidal epithelium in kidney tubules (430x).
12 (c) Simple columnar epithelium Description: Single layer of tall cells with round to oval nuclei; some cells bear cilia; layer may contain mucussecreting unicellular glands (goblet cells). Function: Absorption; secretion of mucus, enzymes, and other substances; ciliated type propels mucus (or reproductive cells) by ciliary action. Location: Nonciliated type lines most of the digestive tract (stomach to anal canal), gallbladder, and excretory ducts of some glands; ciliated variety lines small bronchi, uterine tubes, and some regions of the uterus. Simple columnar epithelial cell Basement membrane Photomicrograph: Simple columnar epithelium of the stomach mucosa (860X).
13 (d) Pseudostratified columnar epithelium Description: Single layer of cells of differing heights, some not reaching the free surface; nuclei seen at different levels; may contain mucussecreting cells and bear cilia. Cilia Mucus of mucous cell Function: Secretion, particularly of mucus; propulsion of mucus by ciliary action. Location: Nonciliated type in male s sperm-carrying ducts and ducts of large glands; ciliated variety lines the trachea, most of the upper respiratory tract. Trachea Photomicrograph: Pseudostratified ciliated columnar epithelium lining the human trachea (570x). Pseudostratified epithelial layer Basement membrane
14 . (e) Stratified squamous epithelium Description: Thick membrane composed of several cell layers; basal cells are cuboidal or columnar and metabolically active; surface cells are flattened (squamous); in the keratinized type, the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of the more superficial layers. Stratified squamous epithelium Function: Protects underlying tissues in areas subjected to abrasion. Location: Nonkeratinized type forms the moist linings of the esophagus, mouth, and vagina; keratinized variety forms the epidermis of the skin, a dry membrane. Photomicrograph: Stratified squamous epithelium lining the esophagus (285x). Nuclei Basement membrane Connective tissue
15 (f) Transitional epithelium Description: Resembles both stratified squamous and stratified cuboidal; basal cells cuboidal or columnar; surface cells dome shaped or squamouslike, depending on degree of organ stretch. Function: Stretches readily and permits distension of urinary organ by contained urine. Location: Lines the ureters, urinary bladder, and part of the urethra. Transitional epithelium Basement membrane Connective tissue Photomicrograph: Transitional epithelium lining the urinary bladder, relaxed state (360X); note the bulbous, or rounded, appearance of the cells at the surface; these cells flatten and become elongated when the bladder is filled with urine.
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17 Given the previous examples (consider the morphology only) the form of living organisms, and with relationships between their structures. First, the tissue type Can you name? Second, where in the body the tissue is found
18 What kind of tissue does this represent? Simple squamous epithelial tissue Where in the body would you find this tissue? lungs
19 What kind of tissue does this represent? Simple squamous epithelial tissue (superior view)
20 What kind of tissue does this represent? Simple cuboidal epithelial tissue Where in the body would you find this tissue? Kidneys (tubules) The lining of the kidney glomerulus (sing.)/glomeruli (pl.) is simple squamous epithelial tissue
21 What kind of tissue does this represent? Simple columnar epithelial tissue Where in the body would you find this tissue? small intestine
22 What kind of tissue does this represent? Pseudostratified (ciliated) columnar epithelial tissue false layered ; it looks like more than one layer, but it is not Where in the body would you find this tissue? trachea lining
23 What kind of tissue does this represent? Stratified squamous epithelial tissue Where in the body would you find this tissue? mouth lining
24 What kind of tissue does this represent? Stratified cuboidal epithelial tissue Where in the body would you find this tissue? salivary glands, sweat glands
25 What kind of tissue does this represent? Stratified columnar epithelial tissue Where in the body would you find this tissue? male reproductive tract
26 What kind of tissue does this represent? Transitional epithelial tissue Where in the body would you find this tissue? empty bladder
27 What kind of tissue does this represent? Transitional epithelial tissue Where in the body would you find this tissue? distended (full) bladder
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30 Type Function Location Characteristics Epithelial Protection, Secretion Absorption, excretion Cover body surfaces, cover and line internal organs, compose glands Lack, blood vessels, readily divide; cells are tightly packed. Connective Bind, support, protect, fill spaces, store fat, produce blood cells Widely distributed throughout the body Mostly have good blood supply; cells are further apart than epithelial cells
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40 Period 8 TV/Smart TV/board DO NOW Diamond Victoria Desmond Winston Fatoumata Janaisha Kamilla Briana Regina Shoudeline Jassiem Alexandria Diane Keniya Ybel Fredericho Damarian Donald Jodi Torey Wasiu Number your half sheet of paper 1-30 Christina Jada uyatta A Semaya Marc Tamesha Selena Amanda Jamireus Kimani Malila Adryene Walid Sumer Armoni Trequan Rhema 10 minutes
41 Type Function Location Characteristics Epithelial Connective Protection, Secretion Absorption, Excretion Bind, Support, protect, fill spaces, store fat, produce blood cells. Cover body surfaces, cover and line internal organs, compose glands Widely distributed throughout the body. Muscle Movement Attached to bones, in the walls of hollow internal organs, heart Nervous Transmit impulses for coordination, regulation, integration, and sensory reception Brain, spinal cord, nerves Lack, blood vessels, readily divide; cells are tightly packed. Mostly have good blood supply; cells are further apart than epithelial cells. Able to contract in response to specific stimuli Cells communicate with each other and with other body parts
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