reticular region

(noun)

The lower region of the dermis.

Related Terms

Examples of reticular region in the following topics:

  • Blood Supply to the Epidermis

    • The dermis is structurally divided into two areas: a superficial area adjacent to the epidermis, called the papillary region, and a deep, thicker area known as the reticular region.
    • The reticular region lies under the papillary region and is usually much thicker.
    • The reticular region receives its name from the dense concentration of collagenous, elastic, and reticular fibers that weave throughout it.
    • Blood vessels that supply the capillaries of the papillary region run through the reticular region.
    • Blood vessels that supply the capillaries of the papillary region are seen running through the reticular layer.

  • Reticular Formation

    • The reticular formation is a region in the pons involved in regulating the sleep-wake cycle and filtering incoming stimuli to discriminate irrelevant background stimuli.
    • The raphe nuclei form a ridge in the middle of the reticular formation, and directly to its periphery, there is a division called the medial reticular formation.
    • The medial reticular formation is large, has long ascending and descending fibers, and is surrounded by the lateral reticular formation.
    • Reticular formation nuclei that modulate activity of the cerebral cortex are part of the reticular activating system.
    • Describe the functions of the reticular formation region of the pons

  • Biology of Emotion

    • The limbic system, autonomic nervous system, and reticular activating system interact in the processing of emotion.
    • The limbic system, autonomic nervous system, and reticular activating system all interact to assist the body in experiencing and processing emotions.
    • The thalamus serves as a sensory relay center; its neurons project signals to both the amygdala and the higher cortical regions for further processing.
    • The reticular activating system (RAS) is a network of neurons that runs through the core of the hindbrain and into the midbrain and forebrain.
    • The reticular activating system is involved in arousal and attention, sleep and wakefulness, and the control of reflexes.

  • Structure of the Skin: Dermis

    • The dermis consists of a papillary and a reticular layer that serve to protect and cushion the body from stress and strain.
    • They are the papillary layer (the upper layer) and the reticular layer (the lower layer).
    • The reticular layer serves to strengthen the skin and also provides our skin with elasticity.
    • The reticular layer also contains hair follicles, sweat glands, and sebaceous glands.

  • Types of Connective Tissue

    • Loose connective tissue is divided into 1) areolar, 2) adipose, 3) reticular.
    • When a body region is inflamed, the areolar tissue in the area soaks up the excess fluid as a sponge and the affected area swells and becomes puffy, a condition called edema.
    • This tissue resembles areolar connective tissue, but the only fibers in its matrix are the reticular fibers, which form a delicate network.
    • The reticular tissue is limited to certain sites in the body, such as internal frameworks that can support lymph nodes, spleen, and bone marrow.

  • Clusters of Neuronal Cell Bodies

    • In anatomical sections, a nucleus shows up as a region of gray matter, often bordered by white matter.
    • For example, the reticular nucleus of the thalamus is a thin layer of inhibitory neurons that surround the thalamus.

  • Metabolic Functions

    • The integumentary system distinguishes, separates, and protects the organism from its surroundings, but also plays a key metabolic function, as the major region for vitamin D production.
    • Beneath this, the dermis comprises two sections, the papillary and reticular layers, and contains connective tissues, vessels, glands, follicles, hair roots, sensory nerve endings, and muscular tissue.

  • Sensory and Motor Tracts

    • Spino-reticulo-thalamo-cortical (part of the ascending reticular arousal system, also known as ARAS).
    • The corticospinal tract also contains the Betz cell (the largest pyramidal cells) that are not found in any other region of the body.

  • Characteristics of Connective Tissue

    • Reticular fibers are short, fine collagenous fibers that can branch extensively to form a delicate network.

  • Structural Elements of Connective Tissue

    • Reticular fibers or reticulin is a histological term used to describe a type of fiber in connective tissue composed of type III collagen.
    • Reticular fibers crosslink to form a fine meshwork (reticulin).
    • Reticular fiber is composed of one or more types of very thin and delicately woven strands of type III collagen.