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Questions and Answers
What is the primary function of nervous tissue?
What is the primary function of nervous tissue?
What type of tissue is responsible for movement in the body?
What type of tissue is responsible for movement in the body?
What is the main component of the nervous system?
What is the main component of the nervous system?
What is the function of the epithelial membranes?
What is the function of the epithelial membranes?
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What is the function of the serous membranes?
What is the function of the serous membranes?
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What is the function of the mucous membranes?
What is the function of the mucous membranes?
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What type of connective tissue is damaged when you cut your finger?
What type of connective tissue is damaged when you cut your finger?
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What is the function of the cutaneous membrane?
What is the function of the cutaneous membrane?
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What is the main component of the integumentary system?
What is the main component of the integumentary system?
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What is the function of the peritoneum?
What is the function of the peritoneum?
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What is the primary function of adipose connective tissue?
What is the primary function of adipose connective tissue?
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What type of fibers are prominent in the intercellular substance of loose connective tissue?
What type of fibers are prominent in the intercellular substance of loose connective tissue?
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What is the main function of reticular tissue?
What is the main function of reticular tissue?
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What is the characteristic of the matrix in dense fibrous tissue?
What is the characteristic of the matrix in dense fibrous tissue?
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What type of connective tissue is characterized by a network of branching reticular fibers?
What type of connective tissue is characterized by a network of branching reticular fibers?
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What is the function of reticular cells in reticular tissue?
What is the function of reticular cells in reticular tissue?
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What is the characteristic of the fibers in irregular dense fibrous tissue?
What is the characteristic of the fibers in irregular dense fibrous tissue?
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What is the primary function of loose connective tissue?
What is the primary function of loose connective tissue?
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What is the primary function of connective tissue in the body?
What is the primary function of connective tissue in the body?
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What is a characteristic of all connective tissues?
What is a characteristic of all connective tissues?
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What is the non-living material that separates the living cells of connective tissue?
What is the non-living material that separates the living cells of connective tissue?
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Which of the following is a type of protein found in the extracellular matrix of connective tissue?
Which of the following is a type of protein found in the extracellular matrix of connective tissue?
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What is the main component of the extracellular matrix in terms of percentage?
What is the main component of the extracellular matrix in terms of percentage?
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What is the result of the particular makeup of the extracellular matrix in bone and cartilage?
What is the result of the particular makeup of the extracellular matrix in bone and cartilage?
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What is a characteristic of cartilage?
What is a characteristic of cartilage?
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What is the function of connective tissue that allows it to bear weight, withstand tension, and ensure abuse?
What is the function of connective tissue that allows it to bear weight, withstand tension, and ensure abuse?
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Study Notes
Connective Tissue
- Connective tissue is the most abundant and widely distributed tissue in the body.
- It has multiple types, appearances, and functions.
- Connective tissue has relatively few cells in its intercellular matrix.
- Its general functions include connecting, supporting, transporting, and protecting.
Characteristics of Connective Tissue
- All connective tissues arise from mesenchyme (an embryonic tissue).
- Connective tissues vary in their degree of vascularity, with some (like cartilage) being avascular.
- The extracellular matrix is a non-living material that separates the living cells of the tissue.
Types of Connective Tissue
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Loose Connective Tissue: has a prominent intercellular substance consisting of collagenous and elastic fibers loosely interwoven and embedded in soft viscous ground substance.
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Functions: stretch, flexible connection.
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Adipose Connective Tissue: contains mostly fat cells (adipocytes) and some fibroblasts, macrophages, and mast cells.
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Functions: acts as a food (energy) reserve, provides support, protection, insulation (white fat), and heat generation (brown fat).
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Reticular Tissue: forms a framework for the spleen, lymph nodes, and bone marrow.
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A network of branching reticular fibers with reticular cells overlying them.
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Functions: defense against microorganisms and other injurious substances, filters out injurious particles, and reticular cells phagocytose them.
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Dense Fibrous Tissue: matrix consists mainly of densely packed fibers and has relatively few fibroblasts.
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Irregular: fibers intertwine irregularly to form a thick mat.
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Regular: bundles of fibers are arranged in regular parallel rows.
Functions of Connective Tissue
- Four main functions: connects, supports, transports, and protects.
Muscle Tissue
- Types: skeletal, smooth, and cardiac muscle.
- Skeletal Muscle: highly cellular, well vascularized, responsible for most body movements.
- Smooth Muscle: contains microfilaments (elaborate networks of actin and myosin filaments) that bring about movement or contraction in all types of cells.
- Cardiac Muscle: highly cellular, well vascularized, responsible for heart movements.
Nervous Tissue
- Main components: brain, spinal cord, and nerves.
- Neuron: specialized nerve cells that generate and conduct impulses.
- Responds to stimuli (via dendrites), transmits electrical impulses (via axon).
- Neuroglia: special connecting, supporting, and coordinating cells that surround neurons.
Body Membranes
- Types: epithelial, connective tissue, cutaneous, serous, mucous, and synovial membranes.
- Functions: cover and protect body surfaces, line body cavities, cover internal organs, anchor organs to each other or to bones, secrete lubricating fluids.
Tissue Repair
- Usually accomplished by means of regeneration of tissue.
- Epithelial and connective tissues regenerate easily.
- Muscle and nervous tissues have very limited abilities to repair themselves.
Connective Tissue: Extracellular Matrix (ECM)
- Matrix: non-living intercellular material.
- Extracellular Matrix: complex, non-living fluid material between cells in a tissue.
- Components: water, proteins (structural proteins: collagen and elastin), and proteoglycans.
- Gives ECM a range of different consistencies, depending on the specific tissue.
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Description
Learn about the characteristics and functions of connective tissue, the most abundant tissue in the body. Understand its various types, appearances, and roles in connecting, supporting, transporting, and protecting.
