Search results
Results from the WOW.Com Content Network
Aerenchyma or aeriferous parenchyma [ 1] or lacunae, is a modification of the parenchyma to form a spongy tissue that creates spaces or air channels in the leaves, stems and roots of some plants, which allows exchange of gases between the shoot and the root. [ 2] The channels of air-filled cavities (see image to right) provide a low-resistance ...
Aquatic respiration. Sea slugs respire through a gill (or ctenidium) Aquatic respiration is the process whereby an aquatic organism exchanges respiratory gases with water, obtaining oxygen from oxygen dissolved in water and excreting carbon dioxide and some other metabolic waste products into the water.
The gas exhaled is 4% to 5% by volume of carbon dioxide, about a hundredfold increase over the inhaled amount. The volume of oxygen is reduced by about a quarter, 4% to 5%, of total air volume. The typical composition is: [18] 5.0–6.3% water vapor; 79% nitrogen [19] 13.6–16.0% oxygen; 4.0–5.3% carbon dioxide; 1% argon
The dark horizontal lines on silver birch bark are the lenticels. [ 1] A lenticel is a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of gymnosperms and dicotyledonous flowering plants. [ 2] It functions as a pore, providing a pathway ...
Ventilation refers to the in-and-out movement of air of the lungs and perfusion is the circulation of blood in the pulmonary capillaries. [ 1] In mammals, physiological respiration involves respiratory cycles of inhaled and exhaled breaths. Inhalation (breathing in) is usually an active movement that brings air into the lungs where the process ...
In aquatic plants diffuse boundary layers (DBLs) around submerged leaves and photosynthetic stems vary based on the leaves' thickness, shape and density and are the main factor responsible for the greatly reduced rate of gaseous transport across the leaf/water boundary and therefore greatly inhibit transport of carbon dioxide. [15]
Anaerobic organism. Spinoloricus cinziae, a metazoan that metabolises with hydrogen, lacking mitochondria and instead using hydrogenosomes. An anaerobic organism or anaerobe is any organism that does not require molecular oxygen for growth. It may react negatively or even die if free oxygen is present. In contrast, an aerobic organism (aerobe ...
Carbaminohemoglobin is a compound that bind to hemoglobin in the blood. Hemoglobin is a protein that is found in red blood cells and it Is crucial for transporting oxygen from the lungs to tissues and organs. Hemoglobin also plays an important role in transporting carbon dioxide from the tissues back to the lungs for exhalation.