The phrase "are extensively connected" is correct and usable in written English.
It can be used to describe a strong or significant relationship or link between two or more entities, concepts, or systems.
Example: "The research findings indicate that various environmental factors are extensively connected to the health of local wildlife populations."
Alternatives: "are deeply linked" or "are closely related".
Moreover, administrators have to ensure that their certificates are extensively connected with other users within the PGP Web of Trust to ensure that as many users as possible will be able to find a trust path to the server.
Bangalore and Hubli are extensively connected with inter-state destinations while other important cities and towns in the state are not so well-connected.
The relationship between the NCF and PAG in descending modulation is incompletely understood, but they share cytoarchitectural homology [6] and are extensively connected [35], [40].
Most of the altered pathways in this network are extensively connected by common metabolites or genes and display similar expression patterns (Figure 6A).
Beyond this modular organization, some cortical areas are extensively connected (referred as hubs) with projections to areas in all modalities [14], [15].
Cells of Kölliker's organ as well as other supporting cells in the immature organ of Corti are extensively connected through gap junctions, forming a syncytium [ 13].
In primates, an anatomical connection between the parietal and pontine regions was revealed44, and the pons was further shown to be extensively connected with cerebellar cortical areas via the middle cerebellar peduncle45.
These cells have been shown to be extensively connected to each other by various types of electrical and chemical synapses.
It is extensively connected with areas of the brain crucial for cognition such as the dorsolateral prefrontal cortex [ 46].
To address these issues, we extended our previous analysis of connectivity variability for visual areas V1, V2, and V4 (Markov et al. 2011) to include prefrontal area 10, which (as shown below) is more extensively connected than are early visual areas and might in principle show different variability dependencies.
