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Microstructure of nacre aragonite tiles. Nacre is the composite biological material that makes up the shell of mollusks, featuring high strength and toughness. Layers of nacre work together to protect soft-bodied organisms from external loads, mainly including predatory attack and underwater currents, and can thus dissipate a large amount of energy during impact.
In anatomy, a suture is a fairly rigid joint between two or more hard elements of an organism, with or without significant overlap of the elements. [ 1 ] Sutures are found in the skeletons or exoskeletons of a wide range of animals, in both invertebrates and vertebrates .
Surgical suture on needle holders. Catgut suture in a vintage glass dispenser. Catgut suture is a type of surgical suture made of twisted strands of purified collagen taken from the small intestine of domesticated ruminants or beef tendon. It is naturally degraded by the body's own proteolytic enzymes.
In a swaged suture the thread is of narrower diameter than the needle, whereas it protrudes on both sides in an eyed needle. Being narrower, the thread in a swaged suture has less drag when passing through tissue than the needle, and, not protruding, is less likely to traumatize friable tissue, earning the combination the designation "atraumatic".
The ecdysial suture is longitudinally placed on the vertex, separating the epicranial halves of the head to the left and right sides. Depending on the insect, the suture may come in different shapes: like either a Y, U or V. Those diverging lines that make up the ecdysial suture are called the frontal or frontogenal sutures.
The light from the lamp (1.) functions as a detectable change in the plant's environment. As a result, the plant exhibits a reaction of phototropism—directional growth (2.) toward the light stimulus.
Wound closure is performed with sutures (stitches), staples, or adhesive tape or glue. Primary intention can only be implemented when the wound is precise and there is minimal disruption to the local tissue and the epithelial basement membrane, e.g. surgical incisions. [102] This process is faster than healing by secondary intention. [101]
Geophysics – the physics of the Earth and its environment in space; also the study of the Earth using quantitative physical methods; Materials physics – use of physics to describe materials in many different ways such as force, heat, light and mechanics.