organ of Corti

Examples of organ of Corti in the following topics:

• Vestibulocochlear (VIII) Nerve

  • Processes from the organ of Corti (the receptor organ for hearing) conduct afferent transmission to the spiral ganglia.
  • It is the inner hair cells of the organ of Corti that are responsible for activating the afferent receptors in response to pressure waves reaching the basilar membrane through the transduction of sound.
  • The vestibular ganglion houses the cell bodies of the bipolar neurons and extends processes to five sensory organs.
  • Three of these are the cristae, located in the ampullae of the semicircular canals.
  • The other two sensory organs supplied by the vestibular neurons are the maculae of the saccule and utricle.

• Development of Hearing and Balance

  • The human inner ear develops during week four of embryonic development from the auditory placode, a thickening of the ectoderm that gives rise to the bipolar neurons of the cochlear and vestibular ganglions.
  • They contain the sensory hair cells and otoliths of the macula of utricle and of the saccule, respectively, which respond to linear acceleration and the force of gravity.
  • Beginning in the fifth week of development, the auditory vesicle also gives rise to the cochlear duct, which contains the spiral organ of Corti and the endolymph that accumulates in the membranous labyrinth.
  • The hair cells develop from the lateral and medial ridges of the cochlear duct, which together with the tectorial membrane make up the organ of Corti.
  • Describe the development of the inner ear for hearing and balance

• Levels of Organization

  • Living organisms are made up of four levels of organization: cells, tissues, organs, and organ systems.
  • An organism is made up of four levels of organization: cells, tissues, organs, and organ systems.
  • The heart, lungs, and brain are all examples of organs.
  • An organ system is a collection of organs that that work together to perform a similar function.
  • An organism contains organ systems made up of organs that consist of tissues, which are in turn made up of cells.

• Organ Transplants

  • Organ transplantation involves moving organs between bodies (or from donor sites on patients' bodies) for the purpose of replacing recipients' damaged or absent organs.
  • The emerging field of regenerative medicine is allowing scientists and engineers to create organs re-grown from the patient's own cells using stem cells or cells extracted from the failing organs.
  • Organs capable of transplantation include hearts, kidneys, livers, lungs, pancreases, intestines, and thymus glands.
  • Unlike organs, most tissues (with the exception of the corneas) can be preserved and stored for up to five years: they can be 'banked. '
  • Transplantation raises a number of bioethical issues, including the definition of death, when and how consent should be given for organ transplantation, and the possibility of payment for transplantation organs.

• Tissues in Levels of Organization

  • The human body is organized at several levels of scale that can each be examined.
  • The human body has many levels of structural organization.
  • At the organ level, complex functions become possible because of the specialized activities of various tissues.
  • An organism is made up of interconnected organ systems.
  • List the various levels of structural organization that make up the human body

• Circumventricular Organs

  • Circumventricular organs are situated adjacent to the brain ventricles and sense concentrations of various compounds in the blood.
  • Circumventricular organs (CVOs) are positioned at distinct sites around the margin of the ventricular system of the brain.
  • These organs secrete or are sites of action of a variety of different hormones, neurotransmitters, and cytokines.
  • The sensory organs are able to sense plasma molecules and pass that information into other regions of the brain.
  • Vascular organ of lamina terminalis: Responsible for the homeostatic conservation of osmolarity.

• Life Functions

  • Cells are the basic unit of life that can be found in every living organism. 
  • Multicellular organisms are typically made up of organ systems, organs, tissues, and cells.
  • More complex organisms are capable of communication.
  • Beyond these zones are the "zones of intolerance," where life for that organism is impossible.
  • While all organisms are composed of nearly identical types of molecules, evolution has enabled extremophile microbes to cope with this wide range of physical and chemical conditions.

• Body Cavities

  • However, the term usually refers to the space where internal organs develop, located between the skin and the outer lining of the gut cavity.
  • It houses the organs of the upper central nervous system, including the brain and the spinal cord.
  • The ventral cavity, the interior space in the front of the body, contains many different organ systems.
  • It houses the primary organs of the cardiovascular and respiratory systems, such as the heart and lungs, but also includes organs from other systems, such as the esophagus and the thymus gland.
  • The abdominal cavity is not contained within bone and houses many organs of the digestive and renal systems, as well as some organs of the endocrine system, such as the adrenal glands.

• Defining Anatomy

  • Anatomy describes the structure and location of the different components of an organism to provide a framework for understanding.
  • Histology, the study of the organization and details of biological tissues
  • The human body has many layers of organization.
  • Biological systems consist of organs that consist of tissues, and tissue in turn is made up of cells and connective tissue.
  • The history of anatomy has been an evolving understanding of organs and structures in the body.

• Lymphoid Tissue

  • Lymphoid tissue consists of many organs that play a role in the production and maturation of lymphocytes in the immune response.
  • The tissues of lymphoid organs are different than the tissues in most other organ systems in that they vary considerably based on cell cycle proliferation of lymphocytes.
  • Central or primary lymphoid organs generate lymphocytes from immature progenitor cells such as lymphoblasts.
  • Lymphatic tissue begins to develop by the end of the fifth week of embryonic development.
  • More specialized primary lymph tissue, such as the thymus, develops from pharyngeal pouches (embryonic structures that differentiate into organs near the pharynx and throat) by the eighth week of gestation.