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  2. Spine (zoology) - Wikipedia

    en.wikipedia.org/wiki/Spine_(zoology)

    Pelvic fin of a Java barb, a ray-finned fish The short fin spines on a coelacanth, a lobe-finned fish A lionfish, with venomous spines The stinger on a stingray's tail. Spines are found in the fins of most bony fishes, particularly actinopterygians (ray-finned fishes), who have folding fan-like fin made of spreading bony spines called lepidotrichia or "rays" covered by thin stretches of skin.

  3. Vertebrate - Wikipedia

    en.wikipedia.org/wiki/Vertebrate

    Vertebrates (/ ˈ v ɜːr t ə b r ɪ t s,-ˌ b r eɪ t s /) [3] are animals with a vertebral column (backbone or spine), and a cranium, or skull. The vertebral column surrounds and protects the spinal cord, while the cranium protects the brain. The vertebrates make up the subphylum Vertebrata with some 65,000 species, by far the largest ...

  4. Spinal column - Wikipedia

    en.wikipedia.org/wiki/Spinal_column

    The spinal column, also known as the vertebral column, spine or backbone, is the core part of the axial skeleton in vertebrates. The vertebral column is the defining and eponymous characteristic of the vertebrate. The spinal column is a segmented column of vertebrae that surrounds and protects the spinal cord.

  5. Spine - Wikipedia

    en.wikipedia.org/wiki/Spine

    Spinal column, also known as the backbone; Dendritic spine, a small membranous protrusion from a neuron's dendrite; Thorns, spines, and prickles, needle-like structures in plants; Spine (zoology), needle-like structures in animals; SPINE (molecular biology) (strep–protein interaction experiment), a method for the detection of protein interactions

  6. Glossary of ichthyology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_ichthyology

    spine A sharp projecting point; an unjointed support in the anterior portions of the dorsal and anal fins. spinous, spiniform, spinate Spine-like or composed of spines. spinous dorsal The anterior part of the dorsal fin supported by spines. spiracles Respiratory openings behind the eyes in sharks and rays. standard length (SL)

  7. Rachis - Wikipedia

    en.wikipedia.org/wiki/Rachis

    In plants, a rachis is the main axis of a compound structure.It can be the main stem of a compound leaf, such as in Acacia or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle.

  8. Hegseth orders immediate pause on gender-affirming medical ...

    www.aol.com/hegseth-orders-immediate-pause...

    Defense Secretary Pete Hegseth ordered an immediate pause on gender-affirming medical care procedures for all active-duty service members in a memo that was addressed to senior Pentagon leadership ...

  9. Glossary of biology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_biology

    This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...