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Questions and Answers
Which type of epithelial tissue is specialized for secretion and is found in kidney tubules?
Which type of epithelial tissue is specialized for secretion and is found in kidney tubules?
- Simple columnar epithelium
- Simple cuboidal epithelium (correct)
- Pseudostratified columnar epithelium
- Simple squamous epithelium
Epithelial tissue contains a rich supply of blood vessels.
Epithelial tissue contains a rich supply of blood vessels.
False (B)
What is one primary function of epithelial tissue?
What is one primary function of epithelial tissue?
Protection, secretion, or absorption
The tissue that consists of a single layer with plate-like cells is called __________ epithelium.
The tissue that consists of a single layer with plate-like cells is called __________ epithelium.
Match the following types of epithelial tissue with their characteristics:
Match the following types of epithelial tissue with their characteristics:
What type of epithelial tissue consists of several cell layers?
What type of epithelial tissue consists of several cell layers?
Absorption is not a function of epithelial tissue.
Absorption is not a function of epithelial tissue.
Name one location where simple squamous epithelium can be found.
Name one location where simple squamous epithelium can be found.
What type of epithelium is composed of several layers and is found in areas subjected to abrasion?
What type of epithelium is composed of several layers and is found in areas subjected to abrasion?
Connective tissues are the least abundant tissues in the body.
Connective tissues are the least abundant tissues in the body.
Name one function of connective tissue.
Name one function of connective tissue.
The three different types of fibers found in connective tissue are collagen fibers, reticular fibers, and ___ fibers.
The three different types of fibers found in connective tissue are collagen fibers, reticular fibers, and ___ fibers.
Loose connective tissue is also known as:
Loose connective tissue is also known as:
Match the following types of connective tissues with their primary characteristics:
Match the following types of connective tissues with their primary characteristics:
Fibroblasts are cells found in connective tissue that secrete fiber proteins.
Fibroblasts are cells found in connective tissue that secrete fiber proteins.
The type of epithelium that contains ciliated cells and forms a mucous membrane is ___ epithelium.
The type of epithelium that contains ciliated cells and forms a mucous membrane is ___ epithelium.
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Study Notes
Major Types of Animal Tissues
- Four primary types: Epithelial, Connective, Muscle, and Nervous tissue.
Epithelial Tissue
- Covers free surfaces and organs; cells are closely packed.
- Contains apical (free surface) and basal (attached to basement membrane) surfaces.
- Lacks blood vessels; receives nutrients from underlying connective tissue.
- Functions include:
- Protection from injury, pathogens, and fluid loss.
- Secretion of enzymes, hormones, mucus, and sweat.
- Absorption of nutrients and respiratory gases.
Types of Epithelial Tissue
-
Simple Epithelia: Single cell layer.
- Simple Squamous: Thin and leaky; facilitates diffusion (e.g., blood capillaries, alveoli).
- Simple Cuboidal: Dice-shaped cells, specialized for secretion (e.g., kidney tubules, glands).
- Simple Columnar: Brick-shaped cells; important in secretion and absorption (e.g., intestinal lining).
- Pseudostratified Columnar: Appears stratified, contains ciliated cells (e.g., nasal passage, trachea).
-
Compound Epithelia: Multiple cell layers.
- Stratified Squamous: Numerous layers, rapidly regenerates; found in areas subjected to abrasion (e.g., skin, mouth, anus).
Connective Tissue
- Most abundant tissue type; connects organs and tissues functionally and structurally.
- Composed of scattered cells within an extracellular matrix, which can be semisolid, liquid, or solid.
- Includes diverse cells:
- Fibroblasts: Secrete fiber proteins.
- Macrophages: Engage in phagocytosis.
- Mast Cells: Secrete heparin and histamine.
- Includes fat cells (storage, insulation) and leukocytes (immune protection).
Types of Fibers in Connective Tissue
- Collagen Fibers: Provide strength and flexibility.
- Reticular Fibers: Join connective tissues to adjacent tissues.
- Elastic Fibers: Allow tissue elasticity.
Functions of Connective Tissue
- Provides binding and structural support.
- Offers protection.
- Facilitates transport of materials.
- Provides insulation.
Types of Connective Tissue
- Loose Connective Tissue (Areolar): Most widely distributed type; binds epithelia and underlying tissues; contains fibroblasts, macrophages, and all three fiber types; found under skin and throughout the body.
- Fibrous Connective Tissue (Dense): Densely packed with collagen fibers; found in tendons (attach muscle to bone) and ligaments (connect bones and joints).
- Adipose Tissue: Packed with adipose cells for energy storage and insulation.
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