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spinal cord myelonit is part of cns 45 cm long in woman 43 cm amp weight 35 gmsorigin from lower part of medulla oblongetashape -long cylindrical
medulla oblongata -conical in appearance lower most part of hind brain its lumen is metacoel or 4th ventriclean oval mass pons virolli lies above
hind brain -1 cerebellum -little part lies below the posterior part of cerebrum amp above the medulla oblongetait conists of
mid brain -optics lobes 4 in number corpora quadrizemmini in frog corpora bizemminisolid optocoel is absent 2 superior coculi and 2 inferior coculi
diancephalon -less visibleoccupies only 1 of brains volumeits lumen is diocoel or iii ventricleroof is epithalamuson it pineal body is presentfloor
cerebrum -largest part of brain 23 of brain 45 of brains weightcerebrum is devided into 2 cerebral hemispheres by longitudinal cerebral fissuregyri
forebrain1 olfactory lobes -1 pair very small solid club shaped separated from each otherfully covered by cerebral
cerebro-spinal fluid -formed mainly by choroid plexus and ependyma of ventriclesit comes out of medulla oblongeta by foramen of magandie and
brain encephelonshape - ovalposition - situated in cranial cavity of skull medulla oblongeta comes out of foramen magnum in the form of spinal
osteoporasis -reduction in bone tissue mass causing weakness of skeletal strength it leads to crush fractureit occurs in pastmenopausal women amp
adaptations in skeleton for upright posture -1 foramen magnum is directed downward so that the head may rest vertically on the
disorder of skeleton and joints -1 sprain - it involves a stretching or tearing of tendons or ligaments2
1 fibrous or immovable joints -occur between the bones of cranium amp in the tooth suckets commonly in the form of
characteristics of females skeleton -1 skull is lighter2 shoulders are nanow3 sacrum is
skull-present in head regionit is supported on the top of vertebral columnit is made up of the hardest and denest bones in the human bodyit consists
human skeleton -hard supportive or protective elements of the animal body form the skeleton system its study in osteologyexoskeleton -present outside
locomotion in star fish -with the help of tube feet aided by fluid pressure in them in a tube feet upper ampulla middle podium and lower sucker
locomotion in octopus -from the ends of arms or ex-current siphon water is throughn with speed opposite to it animal
locomotion in leech -leech moves by looping action of its body on substratumposterior sucker is attached to base body elongates then anterior sucker
locomotion in earthworm -by contrection amp relaxation of muscles waves are formed in body generally from posterior to anteriorsetae are helpfull in
non-muscular movement -1 streaming movement - in amoeba cyclosis is common2 pseudopodial - in leucocyte
movement of body parts -movement of appendages bring about locomotionperapodia setae in annelida jointed legs in arthropoda flat foot in mollusca
locomotion -displacement of bodymostly animals show locomotion except porifera urochordata corals obelia thier larva may show locomotionits
endocrine glands of an insect -the endocrine glands of cockroach are as follows1 intercerebral gland cells these cells lie in