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Lamellae are thin, plate-like structures found in various biological contexts. In bone tissue, they refer to the concentric layers of mineralized matrix that make up the structure of osteons, contributing to bone strength and stability. In other contexts, such as in certain types of algae or fungi, lamellae can refer to the flat, layered arrangements that facilitate processes like gas exchange or nutrient absorption. Overall, lamellae serve important structural and functional roles in different organisms.
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What is the function of stroma lamellae?
Stroma Lamallae is the holow tube-like channel that is paired with a stack of thylakoids (Granum). It transports nutients and substance needed for the thylakoids in order to keep tjhe organelle alive and functioning.
What are the functions of the gill filament the gill arch and the gill rakers?
Ah, the gill filament, gill arch, and gill rakers are all important parts of a fish's gills. The gill filaments help increase surface area for oxygen exchange, the gill arch supports the filaments and contains blood vessels, and the gill rakers help filter out food particles from the water. Each part plays a vital role in helping the fish breathe and eat, keeping them healthy and happy in their underwater world.
Describe the microscopic structure of compact bone?
Under the microscope dense, compact bone shows a definite and a characteristic pattern of arrangement. The ground substance of bone is arranged in concentrated layers (lamellae) round the small canals which run parallel to the long axis (shaft) of the bone. These canals, called Haversian canals, are interconnected with one another via Volkmann's canals and contain a blood vessel, a nerve and a lymph vessel. Each Haversian canal is surrounded by concentric layers of bone matrix (called lamallae) and concentric rings of bone forming cells (osteoblasts). Bone cells remain alive and once they have completely surrounded by the hard bone matrix, they are called osteocytes. The osteocytes are embedded in fluid-filled cavities within the concentric lamellae. These cavities are known as lacunae and occur at regular intervals in these concentric layers of bone tissue. The lacunae are connected to one another and to the Haversian canals by a system of interconnecting canals known as canaliculi. Each Haversian canal, its concentric lamellae, lacunae with osteocytes and canaliculi forms a long cylinder and is called a Haversian system. Separate Haversian systems are joined to each other by means of interstitial lamellae.
