What does Necrose mean?
Necrosis is the death of body tissue. It occurs when too little blood flows to the tissue. This can be from injury, radiation, or chemicals. Necrosis cannot be reversed. When large areas of tissue die due to a lack of blood supply, the condition is called gangrene.
What is self cross-pollination?
A flower is self-pollinated (a “selfer”) if pollen is transferred to it from any flower of the same plant and cross-pollinated (an “outcrosser” or “outbreeder”) if the pollen comes from a flower on a different plant.
What is self-pollinated crop?
Self-pollination is a form of pollination in which pollen from the same plant arrives at the stigma of a flower (in flowering plants) or at the ovule (in gymnosperms).
What is cross-pollination in plants?
Cross-pollination is the process of applying pollen from one flower to the pistils of another flower. Pollination occurs in nature with the help of insects and wind. This process can also be done by hand to produce offspring with desired traits, such as colour or pest resistance.
What is gangrene?
Gangrene is a serious condition where a loss of blood supply causes body tissue to die. It can affect any part of the body but typically starts in the toes, feet, fingers and hands. Gangrene can occur as a result of an injury, infection or a long-term condition that affects blood circulation.
What is sequestrectomy?
A sequestrectomy is a surgical procedure involving the removal of a sequestrum—a fragment of dead bone or other tissue that has separated from healthy tissue as a result of injury or disease. Such fragments (the plural form is sequestra) often end up in a wound or abscess (a collection of pus).
What is pollination BYJU’s?
What is Pollination? Pollination is a method where pollen grains are picked from an anther, which is the male part of a flower and transferred to the flower’s female part called the stigma. To make the pollination work successfully, the pollen grains must be transferred from the same species of flower.
What is pollination Class 7?
Answer: The process by which pollen grains are transferred from the anther of one flower to the stigma of the same or another flower is known as pollination.
What is cross-pollination Class 7?
The cross-pollination is defined as the deposition of pollen grains from a flower to the stigma of another flower. Commonly, the process is done by insects and wind.
Who is Fournier?
Fournier is the name of the French physician who first identified this disease. Gangrene is where your tissues die because of a lack of blood flow or a bacterial infection. Fournier’s gangrene is a type of necrotizing fasciitis (flesh-eating disease).
What causes pus?
Pus is the result of the body’s natural immune system automatically responding to an infection, usually caused by bacteria or fungi. Leukocytes, or white blood cells, are produced in the marrow of bones. They attack the organisms that cause infection.
What is sequestrectomy and Saucerization?
Surgical treatment is required to remove a sequestrum which is done in two procedures – Sequestrectomy and Saucerization. These surgical procedures are performed only after the acute phase of infection has subsided and chronic stage has begun which gives better prognosis.
What is sequestrum and Involucrum?
A sequestrum is a piece of necrotic bone detached from the healthy tissue, usually secondary to a trauma. The proliferation of bone surrounding the sequestrum and the cavity where it sits are called the involucrum. The opening in the new bone is referred to as the cloaca (perforation of new bone).
What is pollination 10th CBSE?
The process of transfer of pollen grains from male anther of a flower to female stigma of same flower or another flower is called pollination.
What is pollination Class 12?
How do you get gangrene?
Causes of gangrene include:
- Lack of blood supply. The blood provides oxygen and nutrients to the body.
- Infection. An untreated bacterial infection can cause gangrene.
- Traumatic injury. Gunshot wounds or crushing injuries from car crashes can cause open wounds that let bacteria into the body.
Why is my pimple pus green?
Pus can sometimes be green because some white blood cells produce a green antibacterial protein called myeloperoxidase. A bacterium called Pseudomonas aeruginosa (P. aeruginosa) produces a green pigment called pyocyanin.
What is pimple pus?
Pimple pus is made from sebum (oil) that gets trapped in your pores, along with a combination of dead skin cells, debris (such as makeup), and bacteria. When you have inflammatory acne lesions (such as pustules, papules, nodules, and cysts), your immune system activates in this area, resulting in noticeable pus.
What does phloem mean in science?
Science definitions for phloem. A tissue in vascular plants that conducts food from the leaves and other photosynthetic tissues to other plant parts. Phloem consists of several different kinds of cells: sieve elements, parenchyma cells, sclereids, and fibers.
What is the central tissue of the phloem called?
The browning in the vascular bundles appeared to be confined to the phloem tissue. The central tissue (x) is called the woody tissue (xylem); the outer, the bast ( phloem ).
What are the sieve elements of phloem?
Phloem cells. The sieve elements are elongated, narrow cells, which are connected together to form the sieve tube structure of the phloem. The sieve element cells are the most highly specialized cell type found in plants.
How does the phloem move photoassimilates?
Through the system of translocation, the phloem moves photoassimilates, mainly in the form of sucrose sugars and proteins, from the leaves where they are produced by photosynthesis to the rest of the plant. The sugars are moved from the source, usually the leaves, to the phloem through active transport.