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Related Concept Videos

Functions of Connective Tissues01:17

Functions of Connective Tissues

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Connective tissues perform a broad range of functions in the body. Their primary function is to connect and link different tissues in the body and act as packaging material between tissues. The areolar tissue, a connective tissue prototype, commonly cements various tissue types in diverse body organs. In contrast, adipose tissue cushions internal organs while insulating the body from heat loss.
Hard connective tissues, such as bones and cartilage, provide structure and support to the body.
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Dietary Connections01:23

Dietary Connections

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In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used...
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Introduction to Connective Tissues01:11

Introduction to Connective Tissues

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Connective tissues are one of the four main tissue types in humans that are extensively present in the body. They are characterized by cells embedded in an extracellular matrix (ECM) composed of a ground substance and three main types of protein fibers— collagen, elastic, and reticular fibers. The ground substance of connective tissues can range from a watery and jelly-like consistency to mineralized and hard. The wide variety of cells in the connective tissues include fibroblasts,...
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Classification of Connective Tissues01:30

Classification of Connective Tissues

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The connective tissues have different properties and functions in the human body. They are broadly categorized into proper, supporting, or fluid connective tissues.
Connective Tissue Proper
Connective tissue proper is the most abundant class of connective tissues. As its name implies, it predominantly connects different tissues in the body. Depending on the cell types, ground substance, viscosity, and fiber types in the ECM, connective tissue proper is further categorized into loose and dense....
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Embryonic Connective Tissues01:20

Embryonic Connective Tissues

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During early development, the embryo forms two types of connective tissues— the mesenchyme and mucoid connective tissue.
The mesenchyme is the first connective tissue that emerges in the developing embryo. It consists of loosely arranged multipotent mesenchymal cells and reticular fibers in the extracellular matrix. This loose arrangement allows easy migration of cells, which is essential for germ layer positioning, patterning, and organ morphogenesis during embryonic development.
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Dense Connective Tissue01:13

Dense Connective Tissue

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Dense connective tissue contains more collagen fibers than loose connective tissue. As a consequence, it displays greater resistance to stretching. There are two major categories of dense connective tissue— regular and irregular.
Dense Regular Connective Tissue
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Updated: Feb 14, 2026

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Frontoparietal Activity Interacts With Task-Evoked Changes in Functional Connectivity.

Kai Hwang1, James M Shine2,3, Mark D'Esposito1

  • 1Helen Wills Neuroscience Institute and Department of Psychology, University of California Berkeley, Berkeley, CA, USA.

Cerebral Cortex (New York, N.Y. : 1991)
|February 8, 2018
PubMed
Summary
This summary is machine-generated.

Brain connectivity dynamically adjusts for task relevance. Frontoparietal regions may guide these flexible interactions by sending top-down signals, enhancing information processing between visual brain areas.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Human Brain Imaging

Background:

  • Flexible interactions between brain regions are crucial for adaptive information processing.
  • The neural mechanisms regulating adaptive communication between brain regions remain largely understudied.

Purpose of the Study:

  • Investigate the neural substrates that regulate adaptive communication between brain regions.
  • Examine how task demands modulate functional connectivity in visual processing networks.

Main Methods:

  • Utilized human functional Magnetic Resonance Imaging (fMRI) to track time-varying, task-evoked functional connectivity.
  • Analyzed changes in connectivity between occipitotemporal and primary visual regions during different tasks.
  • Employed regression analysis to identify brain regions influencing inter-regional coupling.

Main Results:

  • Functional connectivity between ventral temporal and primary visual regions increased during task-relevant information processing.
  • Increased task demands selectively strengthened these targeted connectivity patterns.
  • Activity in frontal and parietal regions correlated with task-evoked functional connectivity, suggesting a role in modulating these interactions.

Conclusions:

  • Frontoparietal regions may exert top-down control to influence task-specific interactions between brain regions.
  • Findings suggest a neural mechanism for adaptive communication supporting flexible information processing.