Angiestudyguide 9 2010 muscle

Angiestudyguide 9 2010 muscle - Zoology 328 Spring 2010...

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Zoology 328 Spring 2010 Study Guide 9 – Axial Skeleton & Muscle Words to Know notochord = cordlike skeleton of the back arcualia = any of the primitive (small) cartilages or structural elements of which a typical vertebra is formed; first appeared in lampreys; lie beside notochord and nerve cord. centrum = part of vertebra that occupies the position occupied early in ontogeny by the notochord ceratotrichia = horny, hairlike fin support; (keratin) in chondrichthyes lepidotrichia = fin rays of bony fishes; (bony) in osteichthyes; probably evolved from sclaes basal pterygiophores = articulates fin to pectoral girdle radial pterygiophores = articulates mainly with metapterygium and supports ceratotrichia scapula = cartilage or cartilage replacement bone of the pectoral girdle clavicle = dermal element of the tetrapod pectoral girdle cleithrum = The large bone that extends from the base of the pectoral fin and forms the posterior edge of the gill chamber coracoid = shaped like a crow’s beak’ ventral replacement bone in the tetrapod pectoral girdle; associated with glenoid fossa that is ventral and brings legs under body ileum = distal portion of the small intestine in mammals ischium = forms lower back and part of hip bone pubis = pubic bone; anterior ossification within the ventral pelvic plate of tetrapods actin = thin filaments that move along myosin to contract muscles myosin = motor proteins that move along actin filaments to aid in muscle movement sliding filament = visible in striated muscle
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syncytium = multinucleated single functional cellular unit; muscle fiber myoblast = An undifferentiated cell in the mesoderm of the vertebrate embryo that is a precursor of a muscle cell myocyte = a contractile cell; an elongated cell in sponges that forms a sphincter around body opening isotonic = contraction that results in actual shortening of muscle; will move bones, etc. work in a physical sense (W= F x D) is done. Isometric = contraction that results in tension development, but muscle length stays the same; no work is done because nothing moves; very important in support somatic mesoderm = developmental component of the later-late mesoderm lining the body wall splanchnic mesoderm = developmental component of the lateral-late mesoderm lining the viscera myotome = part of epimer giving rise to muscle myomere = one of a series of muscle segments myosepta = connective tissue separating successive myomeres epaxial = above an axis hypaxial = below a given axis hypobranchial = paired ventral element in the branchial skeleton between the cerato- and basibranchial elements branchiomeric = referring to parts of the branchial arches Concepts, Functions, Relationships, Interpretations, etc. 1. What prevents the body from telescoping in Amphioxus?
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Angiestudyguide 9 2010 muscle - Zoology 328 Spring 2010...

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