enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Respiratory tract - Wikipedia

    en.wikipedia.org/wiki/Respiratory_tract

    The right lung is larger in size than the left, because of the heart's being situated to the left of the midline. The right lung has three lobes – upper, middle, and lower (or superior, middle, and inferior), and the left lung has two – upper and lower (or superior and inferior), plus a small tongue-shaped portion of the upper lobe known as ...

  3. Respiratory epithelium - Wikipedia

    en.wikipedia.org/wiki/Respiratory_epithelium

    Another important cell type is the pulmonary neuroendocrine cell. These are innervated cells that only make up around 0.5% of the respiratory epithelial cells. [7] The ciliated cells are columnar epithelial cells with specialized ciliary modifications. The ciliated cells make up between 50 and 80 per cent of the epithelium. [8]

  4. List of human cell types - Wikipedia

    en.wikipedia.org/wiki/List_of_human_cell_types

    The Human Cell Atlas project, which started in 2016, had as one of its goals to "catalog all cell types (for example, immune cells or brain cells) and sub-types in the human body". [13] By 2018, the Human Cell Atlas description based the project on the assumption that "our characterization of the hundreds of types and subtypes of cells in the ...

  5. Neuroendocrine cell - Wikipedia

    en.wikipedia.org/wiki/Neuroendocrine_cell

    Pulmonary neuroendocrine cells (PNECs) are specialized airway epithelial cells that occur as solitary cells or as clusters called neuroepithelial bodies (NEBs) in the lung. Pulmonary neuroendocrine cells are also known as bronchial Kulchitsky cells. [2] They are located in the respiratory epithelium of the upper and lower respiratory tract.

  6. Club cell - Wikipedia

    en.wikipedia.org/wiki/Club_cell

    Club cells, also known as bronchiolar exocrine cells, [1] are low columnar/cuboidal cells with short microvilli, found in the small airways (bronchioles) of the lungs. [2] They were formerly known as Clara cells. Club cells are found in the ciliated simple epithelium. These cells may secrete glycosaminoglycans to protect

  7. Heart - Wikipedia

    en.wikipedia.org/wiki/Heart

    In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest, called the mediastinum. [ 4 ] In humans, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles .

  8. Cardiac excitation-contraction coupling - Wikipedia

    en.wikipedia.org/wiki/Cardiac_excitation...

    Located in the wall of the right atrium is a group of specialised cells, called the Sinoatrial node (SAN). These cells, unlike most other cells within the heart, can spontaneously produce action potentials. [5]

  9. Respiratory system - Wikipedia

    en.wikipedia.org/wiki/Respiratory_system

    The skin of these animals is highly vascularized and moist, with moisture maintained via secretion of mucus from specialised cells, and is involved in cutaneous respiration. While the lungs are of primary organs for gas exchange between the blood and the environmental air (when out of the water), the skin's unique properties aid rapid gas ...