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Questions and Answers
Which characteristic distinguishes connective tissue from other tissue types?
Which characteristic distinguishes connective tissue from other tissue types?
- Lack of blood vessels within the tissue.
- Presence of tightly packed cells with minimal extracellular matrix.
- Origin from ectodermal embryonic tissue.
- Cells suspended in an extracellular matrix of fibers and ground substance. (correct)
A sample shows a tissue with fibroblasts producing collagen and elastin. Which class of connective tissue is most likely observed?
A sample shows a tissue with fibroblasts producing collagen and elastin. Which class of connective tissue is most likely observed?
- Cartilage
- Bone
- Blood
- Connective tissue proper (correct)
Which of the following is NOT a primary function of connective tissue?
Which of the following is NOT a primary function of connective tissue?
- Binding other tissues together.
- Generating electrical impulses. (correct)
- Supporting body structures.
- Protecting organs.
If a patient has damage to a tissue that is slow to heal due to a lack of direct blood supply, which tissue is most likely affected?
If a patient has damage to a tissue that is slow to heal due to a lack of direct blood supply, which tissue is most likely affected?
A scientist is studying the embryonic origin of different tissues. From which embryonic tissue does all connective tissue derive?
A scientist is studying the embryonic origin of different tissues. From which embryonic tissue does all connective tissue derive?
In what way is areolar tissue’s structure related to its common function?
In what way is areolar tissue’s structure related to its common function?
Where would areolar connective tissue most likely be found?
Where would areolar connective tissue most likely be found?
What is the primary role of fibroblasts in connective tissue proper?
What is the primary role of fibroblasts in connective tissue proper?
Which of the following best describes the role of fibroblasts in dense regular connective tissue?
Which of the following best describes the role of fibroblasts in dense regular connective tissue?
A tissue sample taken from the wall of a major artery is examined under a microscope. Which type of connective tissue would you expect to find?
A tissue sample taken from the wall of a major artery is examined under a microscope. Which type of connective tissue would you expect to find?
Which type of fiber provides high tensile strength and is typically bundled together as thick, 'white' fibers?
Which type of fiber provides high tensile strength and is typically bundled together as thick, 'white' fibers?
In which of the following locations would you most likely find reticular tissue?
In which of the following locations would you most likely find reticular tissue?
How does dense irregular connective tissue resist tension compared to dense regular connective tissue?
How does dense irregular connective tissue resist tension compared to dense regular connective tissue?
Which of the following describes the primary function of adipose tissue?
Which of the following describes the primary function of adipose tissue?
What is the function of chondrocytes, and where are they located?
What is the function of chondrocytes, and where are they located?
Which type of cartilage is most abundant in the body and has resilient cushioning properties to decrease friction in joints?
Which type of cartilage is most abundant in the body and has resilient cushioning properties to decrease friction in joints?
Flashcards
Histology
Histology
The study of tissues in the body.
Four primary tissue types
Four primary tissue types
The main categories of tissues: epithelial, connective, muscle, and nervous.
Connective Tissue
Connective Tissue
Most abundant tissue in the body, functions to protect, support, and bind other tissues.
Extracellular Matrix
Extracellular Matrix
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Mesenchyme
Mesenchyme
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Fibroblasts
Fibroblasts
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Areolar Tissue
Areolar Tissue
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Four classes of connective tissue
Four classes of connective tissue
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Macrophages
Macrophages
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Mast Cells
Mast Cells
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Collagen Fibers
Collagen Fibers
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Elastic Fibers
Elastic Fibers
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Adipose Tissue
Adipose Tissue
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Hyaline Cartilage
Hyaline Cartilage
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Elastic Cartilage
Elastic Cartilage
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Dense Irregular Connective Tissue
Dense Irregular Connective Tissue
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Study Notes
Human Tissues
- Tissues are groups of similar cells with a shared function. Histology is the study of tissues.
- There are four primary tissue types: epithelial, connective, muscle, and nervous.
Connective Tissue
- Connective tissue is the most abundant tissue by weight. Its purpose is to support, protect, and bind other tissues.
- Cells are located in an extracellular matrix of fibers and ground substance.
- Blood vessels are present in most connective tissues, except cartilage.
- All connective tissues originate from the embryonic tissue called mesenchyme.
- Four types: connective tissue proper, cartilage, bone, and blood.
Connective Tissue Proper
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Areolar Tissue:
- Widely distributed, found beneath skin and epithelium, and between muscles.
- Cell types: fibroblasts (produce fibers), macrophages (defend against infection), and mast cells (release histamine & heparin).
- Fibers: collagen (strong, white fibers), elastic (flexible, yellow fibers).
-
Adipose Tissue:
- Stores energy, provides protection, and insulation.
- Contains fat cells (adipocytes).
-
Reticular Tissue:
- Forms a soft internal skeleton to support other cell types.
- Found in liver, spleen, and lymphatic organs.
- Contains reticular fibers.
-
Dense Regular Connective Tissue:
- Closely packed collagen fibers running in parallel directions, resists stress from one direction.
- Found in tendons and ligaments.
-
Dense Irregular Connective Tissue:
- Bundles of collagen fibers running in many different directions, giving strength.
- Found in the dermis of the skin.
-
Elastic Connective Tissue:
- Composed of a high proportion of elastic fibers, allowing tissue to recoil after stretching.
- Found in walls of major arteries.
Cartilage
- Three types: hyaline, elastic, and fibrocartilage.
- Extracellular matrix is a gel containing proteoglycans and collagen/elastic fibers giving resilience and strength.
- Cells: chondrocytes, located in lacunae.
- Hyaline Cartilage:
- Most abundant type.
- Found in trachea, larynx, and covers ends of long bones.
- Elastic Cartilage:
- Contains many elastic fibers, more flexible.
- Fibrocartilage:
- Tough, acts as a shock absorber. Found in intervertebral discs, pubic symphysis, and knee joint discs.
- Hyaline Cartilage:
Bone (Osseous Tissue)
- Supports and protects the body.
- Extracellular matrix is made of collagen fibers and minerals (hydroxyapatite).
- Cells: osteoblasts (secrete bone matrix), osteocytes (maintain bone matrix).
Blood
- An atypical connective tissue.
- Extracellular matrix is blood plasma.
- Cells: red blood cells (carry gases), white blood cells (fight infection), platelets (blood clotting).
Nervous Tissue
- Found in the brain, spinal cord, and peripheral nerves.
- Composed of neurons that transmit electrical impulses and neuroglial cells, that support, protect, and nourish neurons.
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