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Scutes on a crocodile. Reptile skin is covered with scutes or scales which, along with many other characteristics, distinguish reptiles from animals of other classes. They are made of alpha and beta-keratin and are formed from the epidermis (contrary to fish, in which the scales are formed from the dermis).
Scute of the carapace of a Texas tortoise This detail of a Glyptodon displays its scutes. From the collection of the Children's Museum of Indianapolis . Scutes are similar to scales and serve the same function.
Scutes (left) and skeletal components (right) of a turtle's plastron Pleurodires have an extra scute known as the intergular. It is mostly absent in cryptodires . The turtle shell is a shield for the ventral and dorsal parts of turtles (the order Testudines), completely enclosing all the vital organs of the turtle and in some cases even the ...
Structure of a skeletal muscle. A key component in lateral force transmission in skeletal muscle is the extracellular matrix (ECM). Skeletal muscle is a complex biological material that is composed of muscle fibers and an ECM consisting of the epimysium, perimysium, and endomysium. It can be described as a collagen fiber-reinforced composite.
In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish.
Snake scales are of different shapes and sizes. Snake scales may be granular, have a smooth surface or have a longitudinal ridge or keel on it. Often, snake scales have pits, tubercles and other fine structures which may be visible to the naked eye or under a microscope.
The 5′-most gene of the achaete-scute complex, achaete (short form ac), is a small gene of less than 1000 bp. The Achaete protein is 201 amino acids long and has a relative size of 23 kDa . [ 3 ] As with most classically described Drosophila genes, achaete is named for its mutant phenotype, which is the lack of sensory hairs (macrochaetae and ...
The functions of skeletal muscle include producing movement, maintaining body posture, controlling body temperature, and stabilizing joints. [8] Skeletal muscle is also an endocrine organ . [ 9 ] [ 10 ] [ 11 ] Under different physiological conditions, subsets of 654 different proteins as well as lipids, amino acids, metabolites and small RNAs ...