Stapes is one of the three ear ossicles in the middle ear and is the smallest bone in the human body.

 The axial skeleton is made up of the skull, rib cage and the vertebral column.

 Hyoid bone is located in the neck. 

 Eustachian tube is a part of middle ear

 Organ of corti is present in cochlea of the inner ear and contains auditory sensory cells

 They are  of white blood cells and produced during lymphopoiesis.

 Manatees are aquatic mammals and sloths are arboreal mammals which do not have seven cervical vertebrae 

 Sesamoid bone is found in joints and is the hardest form of cartilage

 It is the elongated shaft of long bone and is the strongest part

 Duodenum of small intestine has alkaline bicarbonate secreting Brunner's glands which minimises the acidity of chyme

Lacteal are lymph vessels that absorb the fat and lymph combination called chyle in the small intestine 

 Cholecystokinin in the duodenum aids the release of digestive enzymes in pancreas and bile from gall bladder

 Chyle is present in lacteals of villi of small intestine and consists of emulsified fats and lymph

 Collecting duct is the central tube to which all renal tubes empty their contents into and is also called Duct of Bellini after the scientist who discovered it

 Named after the scientist who discovered it , column of Bertin is also called renal column and found in kidneys

 They are fused vertebrae so intervertebral discs which separate vertebrae are absent

 Epiphyseal plate lies between epiphysis and metaphysis and is a zone of maximum growth in a long bone

 Parotid gland is the largest salivary gland and opens into the vestibule of mouth opposite the crown of upper 2nd molar tooth

 Epididymis is a part of male reproductive system and is a tightly coiled tube connecting the efferent ducts from each testicle to vas deferens

 Inguinal canal in anterior abdominal wall allows passage of spermatic cord in males and round ligament in females

 Vasopressin also called antidiuretic hormone helps the collecting duct to reabsorb water which is otherwise impermeable to water

 Temporal bone of skull and femur are the two strongest bones in human body

Cavum tympani or tympanic cavity is a small space in middle ear surrounding the malleus ,incus and stapes 

 These are found in long bones which are compact bones 

Odontoid process is a small upward projection from the 2nd cervical vertebra to articulate with the first vertebra