Earthworm circulatory system: A Quick Look Earthworm circulatory system is closed type. Blood is composed of plasma and blood corpuscles. Haemoglobin is dissolved in plasma. The blood circulates in vessels. These include dorsal, ventral, subneural, lateral oesophageal, and supraesophageal blood vessels. Four pairs of tubular hearts are present. These are provided with valves. Anterior two […]
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What is gram staining? Gram staining is the most important procedure in microbiology. It is a laboratory technique that forms the basis of bacterial identification and taxonomic division. The following article is about gram staining and the Method or process used for the gram staining bacillus subtilis Discovery Gram staining was discovered by Danish physician
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Introduction Cells can reproduce from new cells. Continuity of life depends on cell division. In unicellular organisms, cell division is the means of reproduction. Multicellular organisms develop from a single-cell zygote which undergoes repeated cell division to differentiate into a new individual. There are three different processes of cell division namely amitosis, mitosis, and meiosis.
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Radial symmetry is a type of body symmetry in different regions and directions of the body. It is found in both natural objects and organisms and man-made objects (clock, wheel). If a body is not divisible into equal halves by any plane it is called asymmetrical as in sponges. An animal is said to be
Introduction The liver is the largest gland in the body weighing about 1.5 Kg in an adult human. Located at the upper right part of the abdominal cavity below the diaphragm (a shelf-like partition separating the thoracic cavity from the abdominal cavity). It has two main lobes right and left. It receives oxygenated blood from
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Introduction White blood cells and red blood cells are two important constituents of blood. Blood is the fluid connective tissue in the human body. It plays a major role in the transport of nutrients, oxygen, carbon dioxide, and other substances throughout the body. Blood comprises of two parts : Plasma Formed elements or blood corpuscles.
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Introduction Cnidarians inhibit all regions of the world’s ocean and some freshwater environments. They are an integral part of the marine ecosystem. The habitats of cnidarians vary greatly on whether they take on predominantly polyp body forms or medusa body forms. In this topic, we will know in detail about polyp vs medusa forms. About
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Introduction The pancreas, also called a mixed gland, plays an important role in digestion. The enzymes secreted by the pancreas are called pancreatic enzymes to break down foods. It includes amylopsin, trypsin, and steapsin. The pancreatic enzymes are stored in the form of zymogen granules. Enzymes are active proteins and the final form of biocatalysts.
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Introduction Do animal cells have a cell wall? well, the answer to this very curious question is “Animal cells do not possess a cell wall”. It is exclusively present in all plant cells, fungi, bacteria & cyanobacteria. Some protists also have cell walls. The cell wall is basically the outermost, rigid & nonliving covering. In
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Know in one minute about the Classification of life The classification of life is mainly based on basis of their similarities and dissimilarities or according to their natural relationship to each other. Carolus Linnaeus also known as the “Father of Taxonomy” was the pioneer in the work of classification. He was the first to suggest
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