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Positive end-expiratory pressure (PEEP) is the pressure in the lungs (alveolar pressure) above atmospheric pressure (the pressure outside of the body) that exists at the end of expiration. [1] The two types of PEEP are extrinsic PEEP (PEEP applied by a ventilator) and intrinsic PEEP (PEEP caused by an incomplete exhalation).
Many flowering plants reflect as much light as possible within the range of visible wavelengths of the pollinator the plant intends to attract. Flowers that reflect the full range of visible light are generally perceived as white by a human observer. An important feature of white flowers is that they reflect equally across the visible spectrum.
Ornamental plants give millions of people pleasure through gardening, and floriculture is a popular pastime among many. Viticulture and winemaking can provide both culinary and economic values to society. In art, mythology, religion, literature and film, plants play important roles, symbolising themes such as fertility, growth, purity, and rebirth.
Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (/ ˌ æ n dʒ i ə ˈ s p ər m iː /). [ 5 ] [ 6 ] The term 'angiosperm' is derived from the Greek words ἀγγεῖον / angeion ('container, vessel') and σπέρμα / sperma ('seed'), meaning that the seeds are enclosed within a fruit.
Greek mythology mentions many plants and flowers, [122] where for example the lotus tree bears a fruit that causes a pleasant drowsiness, [123] while moly is a magic herb mentioned by Homer in the Odyssey with a black root and white blossoms. [124] Magic plants are found, too, in Serbian mythology, where the raskovnik is supposed to be able to ...
Economic botany is the study of the relationship between people (individuals and cultures) and plants.Economic botany intersects many fields including established disciplines such as agronomy, anthropology, archaeology, chemistry, economics, ethnobotany, ethnology, forestry, genetic resources, geography, geology, horticulture, medicine, microbiology, nutrition, pharmacognosy, and pharmacology. [1]
At the heart of such belief systems is the concept of kinship, which extends beyond human relationships and includes elements of the natural world. [14] Humans, other animals, plants and soil are seen as dependent on each other for survival and health. [13]
Plant-animal interactions are important pathways for the transfer of energy within ecosystems, where both advantageous and unfavorable interactions support ecosystem health. [ 1 ] [ 2 ] Plant-animal interactions can take on important ecological functions and manifest in a variety of combinations of favorable and unfavorable associations, for ...