The Most: Related to body parts

1.       Busiest organ	Heart
2.       Fastest known enzyme	Carbonic anhydrase
3.       Hardest part of the body	Enamel of tooth
4.       Heaviest organ	Liver (1.6 kilograms)
5.       Heaviest part of the body	Skull
6.       Largest (bulkiest) muscle of human body	Gluteus maximus (Buttock muscle)
7.       Largest blood cell	Monocyte
8.       Largest blood vessel (Artery)	Aorta (abdominal aorta)
9.       Largest bone of man	Femur bone
10.   Largest cell	Egg of Ostrich (15- 20 cm in diameter)
11.   Largest cell in human body	Ovum (egg)
12.   Largest cell organelle	Nucleus
13.   Largest endocrine gland	Thyroid gland
14.   Largest enzyme	Catalase
15.   Largest excretory organ	Kidney
16.   Largest gland	Liver (1.5 kg)
17.   Largest nerve	10th cranial nerve (Vagus)
18.   Largest organ	Skin (4 kg; 24 cubic feet)
19.   Largest salivary gland	Parotid gland
20.   Largest sense organ	Skin
21.   Largest vein	Inferior vena cava
22.   Largest WBC	Monocyte
23.   Longest cell	Neuron (Nerve cell)
24.   Longest muscle	Sartorius (Thigh muscle)
25.   Longest nerve	Sciatic
26.   Longest part of the alimentary canal	Small intestine (7m)
27.   Most abundant compound in a cell	Water (Next to water protein)
28.   Most abundant mineral in vertebrate body	Ca (2%); followed by P (1%)
29.   Most flexible organ	Skin
30.   Part having least amount of water	Enamel of tooth
31.   Part having much amount of water	Blood
32.   Part having thickest skin	Sole of the foot (about 4.7 mm)
33.   Part having thinnest skin	Face (0.12 mm)
34.   Second largest gland	Pancreas
35.   Smallest artery	Phrenics (To diaphragm)
36.   Smallest blood vessels	Blood capillaries
37.   Smallest bone	Stapes of ear
38.   Smallest cell	Mycoplasma  gallisepticum (PPLO)
39.   Smallest cell of the vertebrate body	Squamous epithelial cells
40.   Smallest cell organelle	Ribosome (Found in maximum number)
41.   Smallest endocrine gland	Pituitary
42.   Smallest enzyme	Peroxidase
43.   Smallest face bone	Lachrymal bone
44.   Smallest muscle	Stapedius (near stapes)
45.   Smallest nerve	Pathetic trochlear nerve (4th cranial nerve)
46.   Smallest salivary gland	Sublingual gland
47.   Smallest WBC	Lymphocyte
48.   Strongest bone	Femur bone (not jaw bone)
49.   Sweetest protein	Monellin
50.   Sweetest sugar	Fructose
51.   Thinnest skin	Conjunctiva
52.   Hardest working muscle	Heart muscles
53.   Strongest muscle based on its weight	Masseter (Jaw muscles), somebody says it is Uterus
54.   Muscle that can pull with the greatest force	Soleus