Questions and Answers
Which tissue type is avascular?
What are the 4 types of tissue?
Epithelial, connective, muscle, nervous
Loose Connective Tissue is vascular.
True
What is the shape of squamous epithelium?
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Areolar Tissue is avascular.
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What type of epithelial tissue has cube-like cells?
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Which type of gland secretes substances directly into the bloodstream?
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What are the functions of connective tissue?
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Nervous Tissue is vascular.
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What is the primary function of muscle tissue?
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Cuboidal epithelial tissue has ______ cells.
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Connective tissue -cytes refer to what kind of cells?
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What do macrophages in connective tissue do?
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Erythrocytes are white blood cells.
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Which type of epithelial tissue is known to reduce friction?
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Study Notes
Tissue Types Overview
- Four main types of tissue: epithelial, connective, muscle, and nervous.
Epithelial Tissue Characteristics
- Avascular, with no blood vessels; relies on diffusion for nutrient supply.
- Composed of closely packed cells; provides protective barriers and secretory functions.
- Capable of rapid reproduction.
Epithelial Tissue Shapes
- Squamous: Thin, flattened cells.
- Cuboidal: Cube-like cells.
- Columnar: Elongated cells.
- Transitional: Layered cells that can stretch; notably seen in urinary bladder.
Epithelial Layer Types
- Simple: Single layer of cells; allows for efficient absorption and secretion.
- Stratified: Multiple layers; provides added protection.
- Pseudostratified: Appears stratified but all cells contact the basement membrane; found in trachea.
Glandular Epithelia
- Exocrine glands: Secrete substances into ducts for external or internal destination.
- Endocrine glands: Secrete hormones directly into the bloodstream.
- Types include merocrine, apocrine, holocrine, serous, and mucous glands, each with unique secretion mechanisms.
Connective Tissue Characteristics
- Vascularity varies by type; well-vascularized tissues have a good blood supply, while avascular ones do not.
- Cells are spaced apart with a matrix in between them; supports and binds other tissues.
- Functions include support, fat storage, protection, produce blood cells, and immune responses.
Connective Tissue Cells
- -Blasts: Active, immature cells (e.g., fibroblasts, chondroblasts).
- -Cytes: Mature cells involved in maintenance (e.g., adipocytes, osteocytes).
- Mast cells: Release histamine; important in inflammatory response.
- Macrophages: Engulf debris and pathogens, key in immune defense.
- Plasma cells: B lymphocytes that produce antibodies.
Blood Components
- Leukocytes: White blood cells involved in immunity.
- Erythrocytes: Red blood cells responsible for oxygen transport.
Carcinomas
- Cancers that originate from epithelial tissues; account for about 90% of cancer cases.
Specific Tissue Types
- Loose Connective Tissue: Vascular and provides flexibility and support.
- Dense Regular Connective Tissue: Avascular, found in tendons and ligaments.
- Dense Irregular Connective Tissue: Avascular, provides structural support in various directions.
- Adipose Tissue: Vascular connective tissue that stores fat.
- Blood: Specialized connective tissue with both erythrocytes and leukocytes.
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Description
Test your knowledge of epithelial and connective tissues with these flashcards. Explore the differences between vascular and avascular tissue types while reviewing the four fundamental types of tissue. Ideal for students studying Anatomy and Physiology.
