Thanks for sending the clear image! I can now answer question 51 and the questions about epithelial tissue. 51. Here are the labels for the indicated parts of the skull: 1. Frontal bone 4. Zygomatic bone 5. Maxilla 6. Parietal bone 7. Temporal bone Here are the types of epithelial tissue found in the following: 41. Lining of the anal canal: Stratified squamous epithelium (non-keratinized) 42. Inner lining of blood vessels: Simple squamous epithelium (endothelium) 43. Lining of the oesophagus: Stratified squamous epithelium (non-keratinized) 44. Inner lining of Fallopian tube: Simple ciliated columnar epithelium 45. Lining of the trachea: Pseudostratified ciliated columnar epithelium with goblet cells 46. Lining of the kidney tubule: Simple cuboidal epithelium 47. Lining of the vagina: Stratified squamous epithelium (non-keratinized) 48. The epidermis of the skin: Stratified squamous epithelium (keratinized) 49. Lining of the small intestine: Simple columnar epithelium with microvilli and goblet cells 50. The bladder: Transitional epithelium Last free one today — make it count tomorrow, or type /upgrade for unlimited.