BIOLOGY ZNOTES

Days Changes 1 Fertilization. Diameter of egg is close 0.15 mm 2 2 prison theater cellular telephone stage 3 16 prison theater cellular telephone phase (morula) 4 Entry of blastocyst inward the lumen of uterus. Disappearance of zona pellucida. Diameter of blastocyst is close 0.3 mm 7-8 Partial entry of blastocyst within endometrium; Implantation 12 Complete entry of blastocyst into endometrium. Extra-embryonic mesoderm, amnion as well as yolk sac 14 Primitive streak formation 18 Formation of 3-5 pairs of somites 19 Neural groove, neural plate, notochordal plate as well as 6-8 pairs of somites formed. 24 Indication of formation of caput as well as tail region. 21-23 pairs of somites formed. Formation of see continues at ventral side. 28 ...

Ectoderm Mesoderm Endoderm Skin (epidermis) together with their paint cells, hairs, nails. Connective tissues, superficial together with deep fascia, ligaments, tendons, dermis of pare (from dermatotome) Epithelial role of mouth, to a greater extent than or less role of palate, tongue, tonsils, pharynx, oesophagus, stomach, little together with large intestines, upper role of anal canal. Mucosal membrane of lips, cheek, gums, basal part of mouth, to a greater extent than or less parts of palate, nasal apertures. Specialized connector tissues similar adipose tissue, reticular tissues, bones, cartilages. Pharyngo-tympanic tube, middle ear, inner human face upwards of tympanic membrane Lower role of anal canal. Teeth Respiratory tract Glans penis. All muscles Gall bladder, pancreatic duct Labia majora together with out...