Questions and Answers
What three tissues are known as 'loose connective tissues'?
What three tissues are known as 'dense connective tissues'?
What are some of the functions of areolar connective tissue?
It wraps and cushions other organs, plays an important role in inflammation, holds and conveys tissue fluid, and its macrophages phagocytize bacteria.
Where are a few places in the body that areolar connective tissue can be found?
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What is the most obvious structural feature of areolar connective tissue?
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What connective tissue provides a reservoir of water and salts for surrounding body tissue?
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When a body region is inflamed, what does areolar tissue do?
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What connective tissue provides reserve food fuel, insulates against heat loss, and supports and protects organs?
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Where is adipose tissue normally located?
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Where is the nucleus in adipose tissue normally found?
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What accounts for about 90% of adipose connective tissue's mass?
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What is adipose connective tissue's structure?
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Where in the body is reticular connective tissue normally found?
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What kind of fibers are found in the matrix of reticular connective tissue?
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What is the structure of reticular connective tissue?
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What is the function of reticular connective tissue?
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Which connective tissue contains closely packed bundles of collagen fibers running in the same direction?
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Since dense connective tissue has enormous tensile strength, what does it form?
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What is the function of dense regular connective tissue?
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What is the structure of dense regular connective tissue?
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What is the predominant element of dense regular connective tissue?
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What is the difference between dense regular connective tissue and dense irregular connective tissue?
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Where can dense irregular connective tissue be found?
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What is the function of dense irregular connective tissue?
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What is the structure of dense irregular connective tissue?
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Which type of dense connective tissue can stand tension when it is exerted from many different directions?
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What cartilage is the most abundant cartilage type in the body?
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Where can hyaline cartilage be found in the body?
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What is the function of hyaline cartilage?
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What is the structure of hyaline cartilage?
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How does the matrix in hyaline cartilage appear?
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What cartilage is a perfect structural intermediate between hyaline cartilage and dense regular connective tissue?
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Where is fibrocartilage normally located in the body?
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What is the function of fibrocartilage?
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What is the structure of fibrocartilage?
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Why is fibrocartilage found where strong support and the ability to withstand heavy pressure are required?
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What is the structure of elastic cartilage?
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What is the function of elastic cartilage?
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Where is elastic cartilage found in the body?
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What kind of fibers are found in elastic cartilage?
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What kind of bone looks smooth and solid to the naked eye?
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What is the function of bone in the body?
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What is the difference between the density of compact bone and the density of spongy bone?
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Where is spongy bone normally found?
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Where is compact bone normally found?
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What is the structure of spongy bone?
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What is the main function of compact bone?
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What is the structure of blood?
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Where is blood normally found in the body?
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What is the function of blood?
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Why is blood classified as a connective tissue?
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What is the structure of elastic connective tissue?
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Where can elastic connective tissue sometimes be found?
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Study Notes
Loose Connective Tissues
- Areolar, adipose, and reticular are classified as loose connective tissues.
- Areolar connective tissue wraps and cushions organs, supports inflammation, holds tissue fluid, and houses macrophages for phagocytosis.
- Found widely under epithelial layers, in lamina propria of mucous membranes, packaging organs, and surrounding capillaries.
- Its most notable feature is the loose arrangement of fibers, providing flexibility.
- It serves as a reservoir of water and salts for surrounding tissues, aiding in fluid balance during inflammation (edema).
Adipose Connective Tissue
- Provides reserve food fuel, insulation against heat loss, and protection for organs.
- Typically located under the skin, around kidneys, eyeballs, and in breasts.
- Contains adipocytes, which make up about 90% of its mass; nuclei are displaced by large fat droplets.
- Structure includes sparse matrix, closely packed adipocytes, and peripheral nuclei.
Reticular Connective Tissue
- Found in lymphoid organs such as lymph nodes, bone marrow, and spleen.
- Contains a network of reticular fibers that create a supportive framework for various cells.
- Functions to form a soft internal skeleton supporting white blood cells, mast cells, and macrophages.
Dense Connective Tissues
- Dense regular connective tissue has closely packed collagen fibers that run in the same direction and forms strong tendons.
- It attaches muscles to bones and bones to bones, providing tensile strength.
- Dense irregular connective tissue has thicker, irregularly arranged collagen fibers and withstands tension from multiple directions. Commonly found in the dermis of the skin and surrounding joints.
Cartilage Types
- Hyaline cartilage, the most abundant type, is found in embryonic skeleton, joint surfaces, nose, trachea, and larynx. It provides support, cushioning, and resists compressive stress.
- Fibrocartilage serves as a structural intermediate, located in intervertebral discs, pubic symphysis, and knee joint discs. It offers tensile strength and absorbs compressive shock.
- Elastic cartilage contains more elastic fibers, allowing structures to maintain shape while permitting flexibility; found in the external ear and epiglottis.
Bone Tissue
- Compact bone appears smooth and is dense, providing structural support, protecting organs, and storing minerals and fat.
- Spongy bone, found internally, is porous with a honeycomb structure called trabeculae, containing bone marrow in open spaces.
- Bone marrow acts as a site for blood cell production.
Blood Tissue
- Consists of red and white blood cells suspended in a fluid matrix known as plasma.
- Primarily found within blood vessels, blood functions to transport gases, nutrients, wastes, and other substances throughout the body.
- Classified as connective tissue due to its origin from mesenchyme and composite structure.
Elastic Connective Tissue
- Composed of elastic fibers, allowing for stretch and recoil.
- Found in specific ligaments such as ligamenta nucrae and flava, and can also be located in areas that expand and contract, such as the digestive and respiratory tracts.
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Description
Test your knowledge of connective tissues with these flashcards that cover the types and functions of loose and dense connective tissues. Perfect for anyone studying anatomy and physiology, this quiz will help reinforce your understanding of these essential components in the human body.