bids are invited for 1 spermatogenesis and ogenesis ( one plate ) 2 presomite embryo and trophoblast at the end of 3rd week 3 human embryo at 22days 4 transverse section of development of mesodermal germ layer at 17, 19, 20, 21 days 5 transverse section of endodermal lined cavity connection between the gut and yolk sac 6 phases of menstrual cycle 7 relation of the foetal membrane and wall of uterus 8 full term placenta 9 transverse section through embryo at various stages of development to show the formation of the nephric tubule at 21 and 25 days 10 development of the renal pelvis calyces and collecting tubes of the metanephroes at 6 and 7 weeks newborn 11 relationship of hindgut and cloaca at the end of 5th week 12 series of human embryo to show the development of the pharyngeal arches approx. 25, 28 days 5 weeks 13 division of coaca into urogenital sinus in the urinary bladder 14 development urogenital sinus in the urinary bladder 15 relationship of uterus and mesonephric ducts during development 16 transverse section through the testisin the 8th week of development 17 t.s. of ovary at 7th 8th week 18 formation of uterus and vagina 19 development of external genitalia in the male ate the 10th week 20 development of external genitalia in the female ate the 5th week newborn 21 formation of internal spectum 22 development of aortic arches 23 development of inferior vanecava 24 development of portal vain 25 development of atrioventricular valves and chordae tendinae 26 development of umbilical and vitelling vains at the end of 4th 5th 6th week and 3rd month 27 main intra and extra embryonic arteries in a 4mm embryo 28 main componants of venus system in 4mm embryo 29 human circulation before birth 30 human circulation after birth 31 development of pharyngeal clefts and pouches 32 presentation of the migration of the thymus parathyroid gland and ultimobranchial body 33 development of tungus 34 the primitive gastrointestinal trach 25 days 35 development of liver 36 development of pancreas 37 dorsal view of human embryo of 18 days 38 development of spinal cord positional changes 39 various types of spina bifida 40 ventral view of pallete, gum, lip, and nose 41 changes occurring in primordial follicle during 1st half of ovarian cycle 42 relationship of fimbria with ovary 43 schematic representation of the section through human blastocyst recovered from uterine cavity at approximately 4 and half days 44 schematic representation of the 3rd phase of oocyte penetration 45 anomalies of placenta a ) bidiscoidal b ) lobed c ) diffuse d ) placenta succenturiata e ) fenestrated placenta f ) cricumvallate placenta 46 changes from the original aortic arch system 47 coarctation of the aorta 48 abnormal origin of the right subclavian artery 49 definitive structures formed by the cartilaginous components of the various pharyngeal arches 50 oocyte immediately after ovulating 51 early development od head and tail folds 52 development od head and tail folds formation of spectrum transversum, connecting stalk, rotation of cloacal membrane 53 relationship of the pericardial cavity, notochordal plate, blastopore, allantois 54 development of face at 5.7mm, 6.7mm, 11.8mm, 14mm 55 development of interventricular septum 56 division of bulbous cordis by atrio pulmonary septum 57 development of lung primordia 58 development of gut prior to the reduction of umbilical hernia 59 development of gut after the reduction of umbilical hernia 60 diagrams to show schematic stages in the transformation of the undifferentiated genito-uirnary system to the definitive stage in the male. 61 definitive genito-urinary system in male. 62 definitive genito-urinary system in female. 63 schematic section through neural groove, neural tube and their derivatives. 64 mesencephalic and cervical flexures of brain 65 successive stages in the differentiation of suprarenal gland 66 descent of testes 67 from langman-development of primitive streak 68 development of eye 69 development of ear ( b ) 70 development of ear ( d ) 71 development of caecum and appendix 72 inner ear model 73 eye structure model 74 larynx anatomy model 75 mammary gland model 76 female reproductive system 77 male reproductive system 78 liver, pancreas &duodenum 79 liver 80 heart 81 lungs 82 stomach 83 kidney and bladder 84 digestive system 85 fetal skull 86 abnormal implantation sites total quantity : 190